{"id":9321,"date":"2026-08-04T21:45:39","date_gmt":"2026-08-04T12:45:39","guid":{"rendered":"https:\/\/now0930.pe.kr\/wordpress\/?p=9321"},"modified":"2026-08-05T23:49:15","modified_gmt":"2026-08-05T14:49:15","slug":"cavitation-flashing-control-valve-handbook-5-11","status":"publish","type":"post","link":"https:\/\/now0930.pe.kr\/wordpress\/cavitation-flashing-control-valve-handbook-5-11\/","title":{"rendered":"Cavitation, Flashing control valve handbook 5.12"},"content":{"rendered":"\n<!-- WordPress\uc758 '\uc0ac\uc6a9\uc790 \uc815\uc758 HTML' \ube14\ub85d\uc5d0 \uadf8\ub300\ub85c \ubd99\uc5ec\ub123\uc73c\uc2ed\uc2dc\uc624.\n<html>, <head>, <body> \ud0dc\uadf8\ub294 \ud3ec\ud568\ud558\uc9c0 \uc54a\uc558\uc2b5\ub2c8\ub2e4. -->\n<style>\n.cv514-wrap{max-width:1100px;margin:0 auto;color:#1f2937;font-family:\"Noto Sans KR\",\"Noto Sans\",Arial,sans-serif;font-size:17px;line-height:1.75;word-break:keep-all}\n.cv514-wrap *{box-sizing:border-box}\n.cv514-wrap h1,.cv514-wrap h2,.cv514-wrap h3{color:#1c497a;line-height:1.35}\n.cv514-wrap h1{margin:0 0 8px;font-size:2.05rem;text-align:center}\n.cv514-wrap h2{margin:46px 0 18px;padding-bottom:8px;border-bottom:2px solid #1c497a;font-size:1.5rem}\n.cv514-wrap h3{margin:28px 0 10px;font-size:1.18rem}\n.cv514-wrap p{margin:10px 0}\n.cv514-meta{margin:0 0 30px;color:#5b6470;text-align:center}\n.cv514-toc{margin:24px 0 34px;padding:18px 24px;background:#f8fafc;border:1px solid #dbe3ec;border-radius:8px}\n.cv514-toc ol{margin:8px 0 0;padding-left:1.3rem;columns:2;column-gap:30px}\n.cv514-toc li{break-inside:avoid;margin:4px 0}\n.cv514-toc a{color:#1c497a;text-decoration:none}\n.cv514-box{margin:20px 0;padding:18px 20px;border:1px solid;border-radius:8px}\n.cv514-box-title{display:block;margin-bottom:8px}\n.cv514-key{background:#ebf3fb;border-color:#1c497a}\n.cv514-solution{background:#edf7ef;border-color:#2f6f45}\n.cv514-note{background:#fff9e0;border-color:#b7791f}\n.cv514-warning{background:#fdeeee;border-color:#c53030}\n.cv514-eq{margin:18px 0;padding:14px 18px;overflow-x:auto;border:1px solid #cbd5e1;border-radius:7px;background:#f8fafc;font-family:\"Times New Roman\",serif;font-size:1.05rem;text-align:center}\n.cv514-eq .line{display:block;margin:4px 0}\n.cv514-flow{padding-left:1.5rem}\n.cv514-flow li{margin:8px 0;padding:9px 12px;border-left:4px solid #1c497a;background:#eef5fb}\n.cv514-table-wrap{width:100%;margin:18px 0 26px;overflow-x:auto}\n.cv514-wrap table{width:100%;min-width:680px;border-collapse:collapse;font-size:.94rem}\n.cv514-wrap th,.cv514-wrap td{padding:10px 12px;border:1px solid #cbd5e1;vertical-align:top;text-align:left}\n.cv514-wrap th{background:#ebf3fb;color:#163b61}\n.cv514-wrap ul,.cv514-wrap ol{padding-left:1.45rem}\n.cv514-wrap li{margin:5px 0}\n.cv514-profile-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:20px 0}\n.cv514-profile{padding:16px;border:1px solid #cbd5e1;border-radius:8px;background:#fff}\n.cv514-profile-title{font-weight:700;color:#1c497a;margin-bottom:8px}\n.cv514-chart{position:relative;height:230px;border-left:2px solid #64748b;border-bottom:2px solid #64748b;margin:18px 18px 28px 38px}\n.cv514-vapor{position:absolute;left:0;right:0;top:55%;border-top:2px dashed #b45309}\n.cv514-vapor-label{position:absolute;right:-5px;top:calc(55% - 14px);font-family:\"Times New Roman\",serif}\n.cv514-curve{position:absolute;inset:0}\n.cv514-curve svg{width:100%;height:100%;overflow:visible}\n.cv514-axis-x{position:absolute;left:50%;bottom:-28px;transform:translateX(-50%);font-size:.88rem}\n.cv514-axis-y{position:absolute;left:-42px;top:50%;transform:rotate(-90deg) translateY(-50%);transform-origin:center;font-size:.88rem}\n.cv514-label{position:absolute;font-family:\"Times New Roman\",serif;font-weight:700}\n.cv514-p1{left:4%;top:5%}.cv514-pvc{left:38%;bottom:6%}.cv514-p2{right:4%;top:26%}\n.cv514-profile.flashing .cv514-p2{top:62%}\n.cv514-caption{text-align:center;font-weight:700}\n@media(max-width:760px){\n  .cv514-wrap{font-size:16px}\n  .cv514-wrap h1{font-size:1.65rem}\n  .cv514-toc ol{columns:1}\n  .cv514-profile-grid{grid-template-columns:1fr}\n}\n<\/style>\n\n<div class=\"cv514-wrap\">\n  <h1>Control Valve Handbook 5.14<br>Cavitation\uacfc Flashing<\/h1>\n  <p class=\"cv514-meta\">\uc561\uccb4 \uc81c\uc5b4\ubc38\ube0c\uc758 \uc0c1\ubcc0\ud654, \uc190\uc0c1 \uba54\ucee4\ub2c8\uc998 \ubc0f \uc120\uc815 \ub300\ucc45<\/p>\n\n  <nav class=\"cv514-toc\" aria-label=\"\ubaa9\ucc28\">\n    <strong>\ubaa9\ucc28<\/strong>\n    <ol>\n      <li><a href=\"#cv514-overview\">\uac1c\uc694<\/a><\/li>\n      <li><a href=\"#cv514-choked\">Choked Flow\uc640 \uae30\ud3ec \ubc1c\uc0dd<\/a><\/li>\n      <li><a href=\"#cv514-profile\">\uc555\ub825 \ud504\ub85c\ud30c\uc77c\uacfc \ud310\ubcc4<\/a><\/li>\n      <li><a href=\"#cv514-compare\">Cavitation\uacfc Flashing \ube44\uad50<\/a><\/li>\n      <li><a href=\"#cv514-recovery\">Pressure Recovery\uc640 \ubc38\ube0c \ud615\uc2dd<\/a><\/li>\n      <li><a href=\"#cv514-flashing\">Flashing Service\uc758 \ubc38\ube0c \uc120\uc815<\/a><\/li>\n      <li><a href=\"#cv514-cavitation\">Cavitation Service\uc758 \ub300\ucc45<\/a><\/li>\n      <li><a href=\"#cv514-procedure\">\uc120\uc815 \ubc0f \uac80\ud1a0 \uc808\ucc28<\/a><\/li>\n      <li><a href=\"#cv514-summary\">\uae30\uc220\uc0ac \ub2f5\uc548\uc6a9 \ud575\uc2ec \uc815\ub9ac<\/a><\/li>\n    <\/ol>\n  <\/nav>\n<h2 id=\"cv514-overview\">\uac1c\uc694<\/h2>\n<p>\uc561\uccb4\uac00 \uc81c\uc5b4\ubc38\ube0c\uc758 \uc81c\ud55c\ubd80\ub97c \ud1b5\uacfc\ud558\uba74 \uc720\ub85c\uac00 \uc218\ucd95\ud558\uace0 \uc720\uc18d\uc774 \uc99d\uac00\ud55c\ub2e4. \uc2e4\uc81c \uc720\uccb4\uc758 \ucd5c\uc18c \ub2e8\uba74\uc801\uc740 \ubb3c\ub9ac\uc801 \uc81c\ud55c\ubd80 \ubc14\ub85c \ud558\ub958\uc758 <strong>Vena Contracta<\/strong>\uc5d0\uc11c \ud615\uc131\ub41c\ub2e4. \uc774 \uc9c0\uc810\uc5d0\uc11c\ub294 \uc720\uc18d\uc774 \ucd5c\ub300\uc774\uace0 \uc815\uc555\uc774 \ucd5c\uc18c\uac00 \ub41c\ub2e4.<\/p>\n<div class=\"cv514-box cv514-key\"><strong class=\"cv514-box-title\">\ud575\uc2ec<\/strong><div class=\"cv514-eq\">\uc720\ub85c \uc218\ucd95 \u2192 \uc720\uc18d \uc99d\uac00 \u2192 P<sub>vc<\/sub> \uac10\uc18c \u2192 \uc99d\uae30 \uae30\ud3ec \ubc1c\uc0dd \uac00\ub2a5<\/div><\/div>\n<p>\ubc38\ube0c \ud558\ub958\uc5d0\uc11c \uc720\ub85c\uac00 \ud655\ub300\ub418\uba74 \uc720\uc18d\uc740 \uac10\uc18c\ud558\uace0 \uc555\ub825\uc740 \uc77c\ubd80 \ud68c\ubcf5\ub41c\ub2e4. \uadf8\ub7ec\ub098 \uc5d0\ub108\uc9c0\uac00 \ubc38\ube0c\uc5d0\uc11c \uc18c\uc0b0\ub418\ubbc0\ub85c \ud558\ub958\uc555\ub825\uc740 \uc785\uad6c\uc555\ub825\uae4c\uc9c0 \uc644\uc804\ud788 \ud68c\ubcf5\ub418\uc9c0 \uc54a\ub294\ub2e4.<\/p>\n<div class=\"cv514-eq\">P<sub>1<\/sub> \u2192 P<sub>vc<\/sub> \u2192 P<sub>2<\/sub>, &nbsp;&nbsp; P<sub>1<\/sub> &gt; P<sub>2<\/sub><\/div>\n<ul><li>P<sub>1<\/sub>: \ubc38\ube0c \uc785\uad6c\uc555\ub825<\/li><li>P<sub>vc<\/sub>: Vena Contracta \uc555\ub825<\/li><li>P<sub>2<\/sub>: \ubc38\ube0c \ucd9c\uad6c\uc555\ub825<\/li><li>P<sub>v<\/sub>: \uc6b4\uc804\uc628\ub3c4\uc5d0\uc11c \uc561\uccb4\uc758 \uc99d\uae30\uc555<\/li><\/ul>\n<h2 id=\"cv514-choked\">Choked Flow\uc640 \uae30\ud3ec \ubc1c\uc0dd<\/h2>\n<p>IEC \uc561\uccb4 \uc0ac\uc774\uc9d5\uc5d0\uc11c\ub294 \uc561\uccb4 \uc720\ub3d9\uc774 \ucd08\ud06c\ub418\ub294 \ud55c\uacc4 \uc555\ub825\uac15\ud558\ub97c \u0394P<sub>choked<\/sub>\ub85c \uacc4\uc0b0\ud55c\ub2e4.<\/p>\n<div class=\"cv514-eq\">\u0394P<sub>actual<\/sub> = P<sub>1<\/sub> \u2212 P<sub>2<\/sub><\/div>\n<div class=\"cv514-box cv514-warning\"><strong class=\"cv514-box-title\">\uacbd\uace0<\/strong><div class=\"cv514-eq\">\u0394P<sub>actual<\/sub> &gt; \u0394P<sub>choked<\/sub> \u21d2 Cavitation \ub610\ub294 Flashing \uac00\ub2a5<\/div><p>\uc774 \uc870\uac74\uc5d0\uc11c\ub294 \ubc38\ube0c\ubfd0 \uc544\ub2c8\ub77c \uc778\uc811 \ud558\ub958 \ubc30\uad00\uc5d0\ub3c4 \uc190\uc0c1\uc774 \ubc1c\uc0dd\ud560 \uc218 \uc788\ub2e4.<\/p><\/div>\n<p>\uae30\ud3ec\uac00 \uc0dd\uc131\ub418\ub294 \uc9c1\uc811 \uc870\uac74\uc740 Vena Contracta \uc555\ub825\uc774 \uc99d\uae30\uc555\ubcf4\ub2e4 \ub0ae\uc544\uc9c0\ub294 \uac83\uc774\ub2e4.<\/p>\n<div class=\"cv514-eq\">P<sub>vc<\/sub> &lt; P<sub>v<\/sub><\/div>\n<p>\uc774 \ub2e8\uacc4\uae4c\uc9c0\ub294 Cavitation\uacfc Flashing\uc774 \ub3d9\uc77c\ud558\ub2e4. \ub450 \ud604\uc0c1\uc740 \uc555\ub825\ud68c\ubcf5 \ud6c4 \ucd9c\uad6c\uc555\ub825 P<sub>2<\/sub>\uac00 \uc99d\uae30\uc555 P<sub>v<\/sub>\ubcf4\ub2e4 \ub192\uc740\uc9c0 \ub0ae\uc740\uc9c0\uc5d0 \ub530\ub77c \uad6c\ubd84\ud55c\ub2e4.<\/p>\n<h2 id=\"cv514-profile\">\uc555\ub825 \ud504\ub85c\ud30c\uc77c\uacfc \ud310\ubcc4<\/h2>\n\n<div class=\"cv514-profile-grid\">\n  <div class=\"cv514-profile\">\n    <div class=\"cv514-profile-title\">Cavitation \uc555\ub825 \ud504\ub85c\ud30c\uc77c<\/div>\n    <div class=\"cv514-chart\">\n      <div class=\"cv514-vapor\"><\/div>\n      <div class=\"cv514-vapor-label\">P<sub>v<\/sub><\/div>\n      <div class=\"cv514-curve\">\n        <svg viewBox=\"0 0 100 100\" preserveAspectRatio=\"none\" aria-label=\"Cavitation \uc555\ub825 \uace1\uc120\">\n          <polyline points=\"0,12 20,16 42,82 62,30 100,36\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.8\"\/>\n          <line x1=\"42\" y1=\"82\" x2=\"42\" y2=\"100\" stroke=\"#94a3b8\" stroke-width=\"1.4\" stroke-dasharray=\"3 3\"\/>\n        <\/svg>\n      <\/div>\n      <span class=\"cv514-label cv514-p1\">P<sub>1<\/sub><\/span>\n      <span class=\"cv514-label cv514-pvc\">P<sub>vc<\/sub><\/span>\n      <span class=\"cv514-label cv514-p2\">P<sub>2<\/sub><\/span>\n      <span class=\"cv514-axis-x\">\ubc38\ube0c \ud1b5\uacfc \uc704\uce58<\/span>\n      <span class=\"cv514-axis-y\">\uc555\ub825<\/span>\n    <\/div>\n    <div class=\"cv514-caption\">P<sub>vc<\/sub> &lt; P<sub>v<\/sub> &lt; P<sub>2<\/sub><\/div>\n  <\/div>\n\n  <div class=\"cv514-profile flashing\">\n    <div class=\"cv514-profile-title\">Flashing \uc555\ub825 \ud504\ub85c\ud30c\uc77c<\/div>\n    <div class=\"cv514-chart\">\n      <div class=\"cv514-vapor\"><\/div>\n      <div class=\"cv514-vapor-label\">P<sub>v<\/sub><\/div>\n      <div class=\"cv514-curve\">\n        <svg viewBox=\"0 0 100 100\" preserveAspectRatio=\"none\" aria-label=\"Flashing \uc555\ub825 \uace1\uc120\">\n          <polyline points=\"0,12 20,16 42,82 62,66 100,70\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.8\"\/>\n          <line x1=\"42\" y1=\"82\" x2=\"42\" y2=\"100\" stroke=\"#94a3b8\" stroke-width=\"1.4\" stroke-dasharray=\"3 3\"\/>\n        <\/svg>\n      <\/div>\n      <span class=\"cv514-label cv514-p1\">P<sub>1<\/sub><\/span>\n      <span class=\"cv514-label cv514-pvc\">P<sub>vc<\/sub><\/span>\n      <span class=\"cv514-label cv514-p2\">P<sub>2<\/sub><\/span>\n      <span class=\"cv514-axis-x\">\ubc38\ube0c \ud1b5\uacfc \uc704\uce58<\/span>\n      <span class=\"cv514-axis-y\">\uc555\ub825<\/span>\n    <\/div>\n    <div class=\"cv514-caption\">P<sub>vc<\/sub> &lt; P<sub>v<\/sub>, P<sub>2<\/sub> &lt; P<sub>v<\/sub><\/div>\n  <\/div>\n<\/div>\n\n<h3>Cavitation<\/h3>\n<div class=\"cv514-eq\">P<sub>vc<\/sub> &lt; P<sub>v<\/sub> &lt; P<sub>2<\/sub><\/div>\n<p>Vena Contracta\uc5d0\uc11c \uc0dd\uc131\ub41c \uc99d\uae30 \uae30\ud3ec\ub294 \ud558\ub958\uc758 \uc555\ub825\ud68c\ubcf5 \uad6c\uac04\uc5d0\uc11c \ubd95\uad34\ud55c\ub2e4.<\/p>\n<p>\uae30\ud3ec \ubd95\uad34 \uc5d0\ub108\uc9c0\uac00 \ubc38\ube0c \ud45c\uba74 \uac00\uae4c\uc774\uc5d0\uc11c \ubc29\ucd9c\ub418\uba74 \uc7ac\ub8cc\uac00 \uad6d\ubd80\uc801\uc73c\ub85c \ud0c8\ub77d\ud55c\ub2e4.<\/p>\n<h3>Flashing<\/h3>\n<div class=\"cv514-eq\">P<sub>vc<\/sub> &lt; P<sub>v<\/sub>, &nbsp;&nbsp; P<sub>2<\/sub> &lt; P<sub>v<\/sub><\/div>\n<p>\ucd9c\uad6c\uc555\ub825\uc774 \uc99d\uae30\uc555\ubcf4\ub2e4 \ub0ae\uc73c\ubbc0\ub85c \uc0dd\uc131\ub41c \uae30\ud3ec\uac00 \ubd95\uad34\ud558\uc9c0 \uc54a\ub294\ub2e4.<\/p>\n<p>\ud558\ub958 \uc720\ub3d9\uc740 \uc561\uccb4\uc640 \uc99d\uae30\uac00 \ud63c\uc7ac\ub41c \uace0\uc18d 2\uc0c1 \uc720\ub3d9\uc774 \ub41c\ub2e4.<\/p>\n<h2 id=\"cv514-compare\">Cavitation\uacfc Flashing \ube44\uad50<\/h2>\n<div class=\"cv514-table-wrap\"><table><thead><tr><th>\ud56d\ubaa9<\/th><th>Cavitation<\/th><th>Flashing<\/th><\/tr><\/thead><tbody><tr><td>\uae30\ud3ec \ubc1c\uc0dd<\/td><td>P<sub>vc<\/sub> &lt; P<sub>v<\/sub><\/td><td>P<sub>vc<\/sub> &lt; P<sub>v<\/sub><\/td><\/tr><tr><td>\ucd9c\uad6c\uc555\ub825<\/td><td>P<sub>2<\/sub> &gt; P<sub>v<\/sub><\/td><td>P<sub>2<\/sub> &lt; P<sub>v<\/sub><\/td><\/tr><tr><td>\uae30\ud3ec \uac70\ub3d9<\/td><td>\uc555\ub825\ud68c\ubcf5 \ud6c4 \ubd95\uad34<\/td><td>\ud558\ub958\uae4c\uc9c0 \uc9c0\uc18d<\/td><\/tr><tr><td>\uc720\ub3d9\uc0c1\ud0dc<\/td><td>\uae30\ud3ec \uc0dd\uc131 \ud6c4 \uc7ac\uc751\ucd95<\/td><td>\uc561\uccb4\u2013\uc99d\uae30 2\uc0c1 \uc720\ub3d9<\/td><\/tr><tr><td>\uc8fc\uc694 \uc190\uc0c1\uc6d0\ub9ac<\/td><td>\uae30\ud3ec \ubd95\uad34 \uc5d0\ub108\uc9c0<\/td><td>\uace0\uc18d \uc561\uc801 \ubc0f 2\uc0c1 \uc720\ub3d9\uc758 \uce68\uc2dd<\/td><\/tr><tr><td>\uc190\uc0c1 \ud45c\uba74<\/td><td>\uac70\uce60\uace0 \ub2e4\uacf5\uc9c8\uc778 cinder-like \ud615\uc0c1<\/td><td>\ub9e4\ub044\ub7fd\uace0 \uad11\ud0dd\uc774 \uc788\ub294 polished \ud615\uc0c1<\/td><\/tr><tr><td>\ub300\ud45c \uc18c\uc74c<\/td><td>\uc790\uac08\uc774 \ud750\ub974\ub294 \uac83\uacfc \uc720\uc0ac\ud55c \uc18c\uc74c<\/td><td>5.14\uc5d0\uc11c\ub294 \uace0\uc720\ud55c \uc18c\uc74c \ud615\ud0dc\ub97c \ubcc4\ub3c4\ub85c \uc81c\uc2dc\ud558\uc9c0 \uc54a\uc74c<\/td><\/tr><tr><td>\uc190\uc0c1 \uc704\uce58<\/td><td>\ud2b8\ub9bc, \ubc14\ub514 \ubc0f \uc555\ub825\ud68c\ubcf5\uc774 \uc77c\uc5b4\ub098\ub294 \ud558\ub958 \ubc30\uad00<\/td><td>\ucd5c\uace0 \uc720\uc18d\ubd80, \uc8fc\ub85c \ud50c\ub7ec\uadf8\uc640 \uc2dc\ud2b8\ub9c1\uc758 seat line \ubd80\uadfc<\/td><\/tr><tr><td>\ubc38\ube0c\uc5d0 \uc758\ud55c \uadfc\ubcf8 \uc608\ubc29<\/td><td>\uac00\ub2a5: \uc555\ub825\uac15\ud558 \ubd84\ud560 \ub4f1<\/td><td>\ubd88\uac00\ub2a5: P<sub>2<\/sub>\uc640 P<sub>v<\/sub>\uac00 \uacf5\uc815\uc870\uac74\uc73c\ub85c \uacb0\uc815\ub428<\/td><\/tr><\/tbody><\/table><\/div>\n<h2 id=\"cv514-recovery\">Pressure Recovery\uc640 \ubc38\ube0c \ud615\uc2dd<\/h2>\n<p>\ubc38\ube0c \ud615\uc0c1\uc5d0 \ub530\ub77c Vena Contracta \uc774\ud6c4\uc758 \uc555\ub825\ud68c\ubcf5 \uc815\ub3c4\uac00 \ub2ec\ub77c\uc9c4\ub2e4.<\/p>\n<ul><li><strong>High-recovery valve<\/strong>: P<sub>vc<\/sub>\uac00 \ub354 \ub0ae\uc544\uc9c8 \uc218 \uc788\uc5b4 Cavitation\uc5d0 \ub354 \ucde8\uc57d\ud558\ub2e4.<\/li><li><strong>Low-recovery valve<\/strong>: \ub0b4\ubd80 \ub09c\ub958\uc640 \uc5d0\ub108\uc9c0 \uc18c\uc0b0\uc774 \ucee4 \uc555\ub825\ud68c\ubcf5\ub7c9\uc774 \uc0c1\ub300\uc801\uc73c\ub85c \uc791\ub2e4.<\/li><\/ul>\n<div class=\"cv514-box cv514-note\"><strong class=\"cv514-box-title\">\uc8fc\uc758<\/strong><p>High recovery\ub77c\ub294 \ud45c\ud604\uc740 \ub2e8\uc21c\ud788 \uc555\ub825 \uc190\uc2e4\uc774 \uc791\ub2e4\ub294 \uc758\ubbf8\ub9cc\uc740 \uc544\ub2c8\ub2e4.<\/p><p>Vena Contracta \uc555\ub825\uc774 \ub354 \ub0ae\uc544\uc9c8 \uc218 \uc788\uc73c\ubbc0\ub85c \uc561\uccb4\uc758 \uc99d\uae30\uc555 \uc774\ud558\ub85c \ub0b4\ub824\uac08 \uac00\ub2a5\uc131\uc774 \ucee4\uc9c4\ub2e4.<\/p><\/div>\n<h2 id=\"cv514-flashing\">Flashing Service\uc758 \ubc38\ube0c \uc120\uc815<\/h2>\n<p>Flashing\uc740 P<sub>2<\/sub> &lt; P<sub>v<\/sub>\uc778 \uacf5\uc815\uc870\uac74\uc5d0\uc11c \ubc1c\uc0dd\ud55c\ub2e4.<\/p>\n<p>P<sub>2<\/sub>\ub294 \ud558\ub958 \uacf5\uc815\uacfc \ubc30\uad00\uc774 \uacb0\uc815\ud558\uace0, P<sub>v<\/sub>\ub294 \uc720\uccb4\uc640 \uc6b4\uc804\uc628\ub3c4\uac00 \uacb0\uc815\ud55c\ub2e4. \ub530\ub77c\uc11c \uc81c\uc5b4\ubc38\ube0c \uc790\uccb4\ub85c Flashing\uc744 \uc81c\uac70\ud560 \uc218 \uc5c6\ub2e4.<\/p>\n<div class=\"cv514-box cv514-warning\"><strong class=\"cv514-box-title\">\uacbd\uace0<\/strong><div class=\"cv514-eq\">Flashing\uc740 \ubc38\ube0c\ub85c \ubc29\uc9c0\ud558\ub294 \ubb38\uc81c\uac00 \uc544\ub2c8\ub77c \uce68\uc2dd \uc190\uc0c1\uc744 \ucd5c\uc18c\ud654\ud558\ub294 \ubb38\uc81c\uc774\ub2e4.<\/div><\/div>\n<p>\uce68\uc2dd \uc800\uac10\uc758 \uae30\ubcf8 \uc6d0\uce59\uc740 \ub2e4\uc74c\uacfc \uac19\ub2e4.<\/p>\n<ol class=\"\"><li>\uc561\uc801\uc774 \ubc38\ube0c \ud45c\uba74\uc5d0 \ucda9\ub3cc\ud558\ub294 \ud69f\uc218\ub97c \uc904\uc778\ub2e4.<\/li><li>\ucda9\ub3cc\ud558\ub294 \ud45c\uba74\uc5d0 \uac00\ub2a5\ud55c \ud55c \ub2e8\ub2e8\ud55c \uc7ac\ub8cc\ub97c \uc801\uc6a9\ud55c\ub2e4.<\/li><li>\uc2a4\ub85c\ud2c0\ub9c1 \ud558\ub958\uc758 \uc720\ub85c \uba74\uc801\uc744 \ud655\ub300\ud558\uc5ec 2\uc0c1 \uc720\ub3d9 \uc18d\ub3c4\ub97c \ub0ae\ucd98\ub2e4.<\/li><li>\uc720\ub3d9 \ubc29\ud5a5 \ubcc0\ud654\uac00 \uc801\uc740 \ubc38\ube0c \ud615\uc0c1\uc744 \uc120\uc815\ud55c\ub2e4.<\/li><\/ol>\n<p>\uad8c\uc7a5\ub418\ub294 \ud615\uc0c1\uc740 \ub2e4\uc74c\uacfc \uac19\ub2e4.<\/p>\n<ul><li>Sliding-stem angle valve<\/li><li>Eccentric rotary plug valve<\/li><li>Segmented ball valve<\/li><li>Expanded outlet \ub610\ub294 \ud655\ub300\ub41c \ud558\ub958 \uc720\ub85c\ub97c \uac00\uc9c4 \ubc38\ube0c<\/li><\/ul>\n<p>Flashing\uacfc \ubd80\uc2dd\uc774 \ub3d9\uc2dc\uc5d0 \uc874\uc7ac\ud558\uba74 \uc190\uc0c1\uc774 \uc0c1\uc2b9\uc791\uc6a9\uc744 \uc77c\uc73c\ud0a8\ub2e4.<\/p>\n<p>\uc608\ub97c \ub4e4\uc5b4 \ubb3c\uacfc \ud0c4\uc18c\uac15\uc758 \uc870\ud569\uc5d0\uc11c\ub294 \ubd80\uc2dd\uc73c\ub85c \ud615\uc131\ub41c \uc5f0\ud55c \uc0b0\ud654\uce35\uc744 Flashing \uc720\ub3d9\uc774 \ubc18\ubcf5\uc801\uc73c\ub85c \uc81c\uac70\ud560 \uc218 \uc788\ub2e4. \uc774 \uacbd\uc6b0 \ubd80\uc2dd \uc5b5\uc81c\ub97c \uace0\ub824\ud55c \uc7ac\uc9c8 \uc120\uc815\uc774 \ud544\uc694\ud558\ub2e4.<\/p>\n<h2 id=\"cv514-cavitation\">Cavitation Service\uc758 \ub300\ucc45<\/h2>\n<p>Cavitation\uc740 \ub2e4\uc74c \uc138 \uac00\uc9c0 \ubc29\ubc95\uc73c\ub85c \ub300\uc751\ud55c\ub2e4.<\/p>\n<h3>\ubc29\ubc95 1: Cavitation \uc81c\uac70<\/h3>\n<p>\uc804\uccb4 \uc555\ub825\uac15\ud558\ub97c \ub2e4\ub2e8 \ud2b8\ub9bc\uc73c\ub85c \uc5ec\ub7ec \ub2e8\uacc4\uc5d0 \ubd84\ubc30\ud55c\ub2e4.<\/p>\n<div class=\"cv514-eq\">\u0394P<sub>total<\/sub> = \u0394P<sub>1<\/sub> + \u0394P<sub>2<\/sub> + \u00b7\u00b7\u00b7 + \u0394P<sub>n<\/sub><\/div>\n<p>\uac01 \ub2e8\uacc4\uc758 \uad6d\ubd80 \ucd5c\uc800\uc555\ub825\uc774 \uc99d\uae30\uc555\ubcf4\ub2e4 \ub192\ub3c4\ub85d \uc720\uc9c0\ud55c\ub2e4.<\/p>\n<div class=\"cv514-eq\">P<sub>vc,i<\/sub> &gt; P<sub>v<\/sub> &nbsp;&nbsp; for all stages i<\/div>\n<p>\uadf8\ub7ec\uba74 \uc99d\uae30 \uae30\ud3ec\uac00 \uc0dd\uc131\ub418\uc9c0 \uc54a\uc73c\ubbc0\ub85c \ubd95\uad34\ub3c4 \ubc1c\uc0dd\ud558\uc9c0 \uc54a\ub294\ub2e4.<\/p>\n<h3>\ubc29\ubc95 2: \uc190\uc0c1 \uaca9\ub9ac \ubc0f \ucd5c\uc18c\ud654<\/h3>\n<p>Cavitation \uc790\uccb4\ub97c \uc644\uc804\ud788 \uc81c\uac70\ud558\uc9c0 \ubabb\ud558\uba74 \ub2e4\uc74c \ubc29\ubc95\uc744 \uc801\uc6a9\ud55c\ub2e4.<\/p>\n<ul><li>\uae30\ud3ec \ubd95\uad34 \uc601\uc5ed\uc744 \ubc38\ube0c\uc758 \uc8fc\uc694 \ud45c\uba74\uc5d0\uc11c \uaca9\ub9ac\ud55c\ub2e4.<\/li><li>Cavitation\uc758 \uc601\ud5a5\uc744 \ubc1b\ub294 \ud45c\uba74\uc744 \uacbd\ud654\ud55c\ub2e4.<\/li><li>\ubc38\ube0c \ud45c\uba74\uc5d0 \uc804\ub2ec\ub418\ub294 \ubd95\uad34 \ucda9\uaca9\uc744 \ucd5c\uc18c\ud654\ud55c\ub2e4.<\/li><\/ul>\n<h3>\ubc29\ubc95 3: \uc2dc\uc2a4\ud15c \uc870\uac74 \ubcc0\uacbd<\/h3>\n<p>\ud558\ub958\uc555\ub825 P<sub>2<\/sub>\ub97c \ub192\uc5ec Vena Contracta \uc555\ub825\uc774 \uc99d\uae30\uc555 \uc774\ud558\ub85c \ub0b4\ub824\uac00\uc9c0 \uc54a\ub3c4\ub85d \ud55c\ub2e4.<\/p>\n<ul><li>\ubc38\ube0c\ub97c \ud558\ub958 \uc815\uc555\uc218\ub450\uac00 \ub354 \ud070 \uc704\uce58\ub85c \uc774\ub3d9\ud55c\ub2e4.<\/li><li>\uc624\ub9ac\ud53c\uc2a4 \ud50c\ub808\uc774\ud2b8 \ub610\ub294 Backpressure Device\ub97c \uc801\uc6a9\ud55c\ub2e4.<\/li><li>\ubc30\uad00\uacfc \uacf5\uc815\uc870\uac74\uc744 \ubcc0\uacbd\ud558\uc5ec \ubc38\ube0c \uc555\ub825\uac15\ud558\ub97c \uc904\uc778\ub2e4.<\/li><\/ul>\n<div class=\"cv514-box cv514-note\"><strong class=\"cv514-box-title\">\uc8fc\uc758<\/strong><p>Backpressure Device\ub97c \uc801\uc6a9\ud558\uba74 \ubc38\ube0c\uc758 Cavitation\uc740 \uc904\uc5b4\ub4e4 \uc218 \uc788\ub2e4.<\/p><p>\uadf8\ub7ec\ub098 Cavitation \uc704\uce58\uac00 \uc624\ub9ac\ud53c\uc2a4\uc640 \uac19\uc740 \ud558\ub958 \uc81c\ud55c\uc7a5\uce58\ub85c \uc774\ub3d9\ud560 \uc218 \uc788\uc73c\ubbc0\ub85c \uc2dc\uc2a4\ud15c \uc804\uccb4\ub97c \uac80\ud1a0\ud574\uc57c \ud55c\ub2e4.<\/p><\/div>\n<h2 id=\"cv514-procedure\">\uc120\uc815 \ubc0f \uac80\ud1a0 \uc808\ucc28<\/h2>\n<ol class=\"\"><li>\uc785\uad6c\uc555\ub825 P<sub>1<\/sub>, \ucd9c\uad6c\uc555\ub825 P<sub>2<\/sub>, \uc6b4\uc804\uc628\ub3c4 \ubc0f \uc99d\uae30\uc555 P<sub>v<\/sub>\ub97c \ud655\uc778\ud55c\ub2e4.<\/li><li>\uc2e4\uc81c \uc555\ub825\uac15\ud558\ub97c \uacc4\uc0b0\ud55c\ub2e4: \u0394P<sub>actual<\/sub> = P<sub>1<\/sub> \u2212 P<sub>2<\/sub>.<\/li><li>IEC \uc561\uccb4 \uc0ac\uc774\uc9d5\uc73c\ub85c \u0394P<sub>choked<\/sub>\ub97c \ud655\uc778\ud55c\ub2e4.<\/li><li>\u0394P<sub>actual<\/sub> &gt; \u0394P<sub>choked<\/sub>\uc774\uba74 \ucd08\ud06c \uc720\ub3d9\uacfc \uc0c1\ubcc0\ud654 \uac00\ub2a5\uc131\uc744 \uac80\ud1a0\ud55c\ub2e4.<\/li><li>P<sub>vc<\/sub> &lt; P<sub>v<\/sub>\uc778\uc9c0 \ud655\uc778\ud558\uc5ec \uae30\ud3ec \ubc1c\uc0dd \uac00\ub2a5\uc131\uc744 \ud310\ub2e8\ud55c\ub2e4.<\/li><li>P<sub>2<\/sub> &gt; P<sub>v<\/sub>\uc774\uba74 Cavitation, P<sub>2<\/sub> &lt; P<sub>v<\/sub>\uc774\uba74 Flashing\uc73c\ub85c \uad6c\ubd84\ud55c\ub2e4.<\/li><li>Cavitation\uc774\uba74 \ub2e4\ub2e8 \uac10\uc555, \uc190\uc0c1 \uaca9\ub9ac \ub610\ub294 P<sub>2<\/sub> \uc0c1\uc2b9 \ubc29\uc548\uc744 \uac80\ud1a0\ud55c\ub2e4.<\/li><li>Flashing\uc774\uba74 \uc9c1\uc120 \uc720\ub85c, \ud655\ub300 \ucd9c\uad6c, \uc18d\ub3c4 \uc800\uac10 \ubc0f \uacbd\uc9c8\uc7ac\ub8cc\ub97c \uc801\uc6a9\ud55c\ub2e4.<\/li><li>\ud2b8\ub9bc\ubfd0 \uc544\ub2c8\ub77c \ubc38\ube0c \ubc14\ub514\uc640 \uc778\uc811 \ud558\ub958 \ubc30\uad00\uc758 \uc190\uc0c1 \uac00\ub2a5\uc131\uc744 \ud655\uc778\ud55c\ub2e4.<\/li><li>\ubd80\uc2dd\uacfc \uce68\uc2dd\uc758 \ubcf5\ud569\uc791\uc6a9\uc744 \uace0\ub824\ud558\uc5ec \ubc14\ub514\uc640 \ud2b8\ub9bc \uc7ac\uc9c8\uc744 \uc120\uc815\ud55c\ub2e4.<\/li><\/ol>\n<h2 id=\"cv514-summary\">\uae30\uc220\uc0ac \ub2f5\uc548\uc6a9 \ud575\uc2ec \uc815\ub9ac<\/h2>\n<div class=\"cv514-box cv514-key\"><strong class=\"cv514-box-title\">\ud575\uc2ec<\/strong><p>\uc561\uccb4\uac00 \uc81c\uc5b4\ubc38\ube0c\uc758 \uc81c\ud55c\ubd80\ub97c \ud1b5\uacfc\ud558\uba74 Vena Contracta\uc5d0\uc11c \uc720\uc18d\uc774 \ucd5c\ub300\uac00 \ub418\uace0 \uc555\ub825\uc774 \ucd5c\uc18c\uac00 \ub41c\ub2e4.<\/p><p>P<sub>vc<\/sub> &lt; P<sub>v<\/sub>\uac00 \ub418\uba74 \uc99d\uae30 \uae30\ud3ec\uac00 \ubc1c\uc0dd\ud55c\ub2e4.<\/p><p>\uc774\ud6c4 \ucd9c\uad6c\uc555\ub825\uc774 \uc99d\uae30\uc555\ubcf4\ub2e4 \ub192\uc544 \uae30\ud3ec\uac00 \ubd95\uad34\ud558\uba74 Cavitation\uc774\uace0, \ucd9c\uad6c\uc555\ub825\uc774 \uc99d\uae30\uc555\ubcf4\ub2e4 \ub0ae\uc544 \uae30\ud3ec\uac00 \ud558\ub958\uae4c\uc9c0 \uc720\uc9c0\ub418\uba74 Flashing\uc774\ub2e4.<\/p><\/div>\n<div class=\"cv514-eq\">P<sub>vc<\/sub> &lt; P<sub>v<\/sub> &lt; P<sub>2<\/sub> \u21d2 Cavitation<\/div>\n<div class=\"cv514-eq\">P<sub>vc<\/sub> &lt; P<sub>v<\/sub>, &nbsp;&nbsp; P<sub>2<\/sub> &lt; P<sub>v<\/sub> \u21d2 Flashing<\/div>\n<div class=\"cv514-box cv514-solution\"><strong class=\"cv514-box-title\">\uacb0\ub860<\/strong><p>Cavitation\uc740 \uc804\uccb4 \uc555\ub825\uac15\ud558\ub97c \ub2e4\ub2e8 \ud2b8\ub9bc\uc73c\ub85c \ubd84\ud560\ud558\uc5ec \uac01 \ub2e8\uacc4\uc758 \ucd5c\uc800\uc555\ub825\uc744 \uc99d\uae30\uc555 \uc774\uc0c1\uc73c\ub85c \uc720\uc9c0\ud558\uba74 \ubc29\uc9c0\ud560 \uc218 \uc788\ub2e4.<\/p><p>\ubc18\uba74 Flashing\uc740 \ud558\ub958\uc555\ub825\uacfc \uc99d\uae30\uc555\uc774 \uacb0\uc815\ud558\ub294 \uacf5\uc815\ud604\uc0c1\uc774\ubbc0\ub85c \ubc38\ube0c \uc790\uccb4\ub85c \uc81c\uac70\ud560 \uc218 \uc5c6\ub2e4.<\/p><p>\ub530\ub77c\uc11c \uc9c1\uc120 \uc720\ub85c, \ud655\ub300\ub41c \ud558\ub958 \uc720\ub85c, \uc18d\ub3c4 \uc800\uac10 \ubc0f \uacbd\uc9c8\uc7ac\ub8cc\ub97c \uc801\uc6a9\ud558\uc5ec \uce68\uc2dd \uc190\uc0c1\uc744 \ucd5c\uc18c\ud654\ud574\uc57c \ud55c\ub2e4.<\/p><\/div>\n<h2 id=\"cv514-reference\">\ucc38\uace0\uc790\ub8cc<\/h2>\n<ul><li>Emerson, <em>Control Valve Handbook<\/em>, Sixth Edition, Section 5.14.<\/li><\/ul>\n<\/div>\n\n\n\n<div data-wp-interactive=\"core\/file\" class=\"wp-block-file\"><object data-wp-bind--hidden=\"!state.hasPdfPreview\" hidden class=\"wp-block-file__embed\" data=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2026\/08\/valve-2.pdf\" type=\"application\/pdf\" style=\"width:100%;height:600px\" aria-label=\"valve\uc758 \uc0bd\uc785.\"><\/object><a id=\"wp-block-file--media-68d9b3a4-ce01-4e48-8c23-d5c274668dfe\" href=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2026\/08\/valve-2.pdf\">valve<\/a><a href=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2026\/08\/valve-2.pdf\" class=\"wp-block-file__button wp-element-button\" download aria-describedby=\"wp-block-file--media-68d9b3a4-ce01-4e48-8c23-d5c274668dfe\">\ub2e4\uc6b4\ub85c\ub4dc<\/a><\/div>\n\n\n\n<pre class=\"wp-block-code\"><code>{\n  \"topic_id\": \"control_valve_cavitation_flashing_vena_contracta_choked_flow_selection\",\n  \"title\": \"Control Valve Handbook 5.14 Cavitation and Flashing\",\n  \"language\": \"ko\",\n  \"document_purpose\": &#91;\n    \"\uc0b0\uc5c5\uacc4\uce21\uc81c\uc5b4\uae30\uc220\uc0ac \ub2f5\uc548 \uc791\uc131\",\n    \"\uc81c\uc5b4\ubc38\ube0c \uc561\uccb4 \uc11c\ube44\uc2a4 \uc120\uc815\",\n    \"Cavitation\uacfc Flashing\uc758 \ud310\ubcc4\",\n    \"\uc190\uc0c1 \ud615\ud0dc\uc640 \ub300\ucc45\uc758 \uad6c\uc870\ud654\"\n  ],\n  \"source_scope\": {\n    \"primary_source\": \"Emerson Control Valve Handbook, Sixth Edition\",\n    \"chapter\": 5,\n    \"sections\": &#91;\n      \"5.14 Cavitation and Flashing\",\n      \"5.14.1 Choked Flow Causes Flashing and Cavitation\",\n      \"5.14.2 Valve Selection for Flashing Service\",\n      \"5.14.3 Valve Selection for Cavitation Service\"\n    ]\n  },\n  \"symbols\": {\n    \"P1\": {\n      \"meaning\": \"\ubc38\ube0c \uc785\uad6c\uc555\ub825\",\n      \"location\": \"valve inlet\"\n    },\n    \"Pvc\": {\n      \"meaning\": \"Vena Contracta\uc758 \uc555\ub825\",\n      \"location\": \"minimum flow-area region immediately downstream of the restriction\"\n    },\n    \"P2\": {\n      \"meaning\": \"\ubc38\ube0c \ucd9c\uad6c\uc555\ub825\",\n      \"location\": \"valve outlet\"\n    },\n    \"Pv\": {\n      \"meaning\": \"\uc6b4\uc804\uc628\ub3c4\uc5d0\uc11c \uc561\uccb4\uc758 \uc99d\uae30\uc555\",\n      \"dependency\": &#91;\n        \"fluid type\",\n        \"operating temperature\"\n      ]\n    },\n    \"deltaP_actual\": {\n      \"meaning\": \"\ubc38\ube0c \uc591\ub2e8\uc758 \uc2e4\uc81c \uc555\ub825\uac15\ud558\",\n      \"equation\": \"deltaP_actual = P1 - P2\"\n    },\n    \"deltaP_choked\": {\n      \"meaning\": \"IEC \uc561\uccb4 \uc0ac\uc774\uc9d5\uc73c\ub85c \uacc4\uc0b0\ud558\ub294 \ucd08\ud06c \uc555\ub825\uac15\ud558\"\n    }\n  },\n  \"core_mechanism\": &#91;\n    {\n      \"sequence\": 1,\n      \"event\": \"\uc561\uccb4\uac00 \ubc38\ube0c \uc81c\ud55c\ubd80\ub97c \ud1b5\uacfc\ud55c\ub2e4.\"\n    },\n    {\n      \"sequence\": 2,\n      \"event\": \"\uc720\uccb4 \ud750\ub984\uc758 \ub2e8\uba74\uc801\uc774 \uac10\uc18c\ud55c\ub2e4.\"\n    },\n    {\n      \"sequence\": 3,\n      \"event\": \"Vena Contracta\uc5d0\uc11c \uc720\uc18d\uc774 \ucd5c\ub300\uac00 \ub41c\ub2e4.\"\n    },\n    {\n      \"sequence\": 4,\n      \"event\": \"\uc6b4\ub3d9\uc5d0\ub108\uc9c0 \uc99d\uac00\uc5d0 \ub530\ub77c \uc815\uc555\uc774 \ucd5c\uc18c\uac00 \ub41c\ub2e4.\"\n    },\n    {\n      \"sequence\": 5,\n      \"event\": \"Pvc\uac00 Pv\ubcf4\ub2e4 \ub0ae\uc544\uc9c0\uba74 \uc99d\uae30 \uae30\ud3ec\uac00 \uc0dd\uc131\ub41c\ub2e4.\"\n    },\n    {\n      \"sequence\": 6,\n      \"event\": \"\ud558\ub958 \uc555\ub825\ud68c\ubcf5 \ud6c4 \uae30\ud3ec\uac00 \ubd95\uad34\ud558\ub294\uc9c0 \uc720\uc9c0\ub418\ub294\uc9c0\uc5d0 \ub530\ub77c Cavitation\uacfc Flashing\uc744 \uad6c\ubd84\ud55c\ub2e4.\"\n    }\n  ],\n  \"choked_flow_relation\": {\n    \"warning_condition\": \"deltaP_actual &gt; deltaP_choked\",\n    \"meaning\": \"Cavitation \ub610\ub294 Flashing\uc774 \ubc1c\uc0dd\ud560 \uc218 \uc788\ub2e4.\",\n    \"possible_consequence\": &#91;\n      \"control valve structural damage\",\n      \"trim damage\",\n      \"adjacent downstream piping damage\"\n    ],\n    \"important_note\": \"Choked flow, Cavitation \ubc0f Flashing\uc740 \uad00\ub828\ub418\uc5b4 \uc788\uc73c\ub098 \ub3d9\uc77c\ud55c \uc6a9\uc5b4\uac00 \uc544\ub2c8\ub2e4.\"\n  },\n  \"bubble_formation\": {\n    \"condition\": \"Pvc &lt; Pv\",\n    \"result\": \"liquid vapor bubbles form\",\n    \"shared_stage\": \"\uc774 \ub2e8\uacc4\uae4c\uc9c0\ub294 Cavitation\uacfc Flashing\uc774 \ub3d9\uc77c\ud558\ub2e4.\"\n  },\n  \"decision_logic\": {\n    \"no_vapor_bubble\": {\n      \"condition\": \"Pvc &gt;= Pv\",\n      \"classification\": \"no vapor bubble formation\"\n    },\n    \"cavitation\": {\n      \"condition\": \"Pvc &lt; Pv and P2 &gt; Pv\",\n      \"compact_equation\": \"Pvc &lt; Pv &lt; P2\",\n      \"bubble_behavior\": \"\uc99d\uae30 \uae30\ud3ec\uac00 \ud558\ub958 \uc555\ub825\ud68c\ubcf5 \uad6c\uac04\uc5d0\uc11c \ubd95\uad34\ud55c\ub2e4.\"\n    },\n    \"flashing\": {\n      \"condition\": \"Pvc &lt; Pv and P2 &lt; Pv\",\n      \"compact_equation\": \"Pvc &lt; Pv, P2 &lt; Pv\",\n      \"bubble_behavior\": \"\uc99d\uae30 \uae30\ud3ec\uac00 \ubd95\uad34\ud558\uc9c0 \uc54a\uace0 \ud558\ub958\ub85c \uc9c0\uc18d\ub41c\ub2e4.\"\n    }\n  },\n  \"cavitation\": {\n    \"definition\": \"Vena Contracta\uc5d0\uc11c \ubc1c\uc0dd\ud55c \uc99d\uae30 \uae30\ud3ec\uac00 \ud558\ub958\uc758 \uc555\ub825\ud68c\ubcf5 \uad6c\uac04\uc5d0\uc11c \ubd95\uad34\ud558\ub294 \ud604\uc0c1\",\n    \"pressure_condition\": \"Pvc &lt; Pv &lt; P2\",\n    \"damage_mechanism\": \"\uae30\ud3ec \ubd95\uad34 \uc2dc \ubc29\ucd9c\ub418\ub294 \uc5d0\ub108\uc9c0\uac00 \ubc38\ube0c\uc758 \uace0\uccb4 \ud45c\uba74\uc5d0\uc11c \uc7ac\ub8cc\ub97c \uad6d\ubd80\uc801\uc73c\ub85c \uc81c\uac70\ud55c\ub2e4.\",\n    \"damage_appearance\": \"rough and cinder-like surface\",\n    \"noise_signature\": \"gravel flowing through the valve\uc640 \uc720\uc0ac\ud55c \uc18c\uc74c\",\n    \"damage_locations\": &#91;\n      \"valve trim\",\n      \"valve body\",\n      \"adjacent downstream piping where pressure recovery and bubble collapse occur\"\n    ],\n    \"recovery_relation\": {\n      \"high_recovery_valve\": \"Vena Contracta \uc555\ub825\uc774 \ub354 \ub0ae\uc544\uc9c8 \uc218 \uc788\uc5b4 Cavitation\uc5d0 \ub354 \ucde8\uc57d\ud558\ub2e4.\",\n      \"low_recovery_valve\": \"\ub0b4\ubd80 \ub09c\ub958\uc640 \uc5d0\ub108\uc9c0 \uc18c\uc0b0\uc774 \ucee4 \uc555\ub825\ud68c\ubcf5\ub7c9\uc774 \uc0c1\ub300\uc801\uc73c\ub85c \uc791\ub2e4.\"\n    },\n    \"treatment_methods\": &#91;\n      {\n        \"method\": \"eliminate cavitation\",\n        \"principle\": \"\uc804\uccb4 \uc555\ub825\uac15\ud558\ub97c \ub2e4\ub2e8 \ud2b8\ub9bc\uc73c\ub85c \uc5ec\ub7ec \ub2e8\uacc4\uc5d0 \ubd84\ud560\ud55c\ub2e4.\",\n        \"design_condition\": \"Pvc_i &gt; Pv for every stage\",\n        \"result\": \"\uc99d\uae30 \uae30\ud3ec\uac00 \uc0dd\uc131\ub418\uc9c0 \uc54a\uc73c\ubbc0\ub85c Cavitation\uc774 \ubc1c\uc0dd\ud558\uc9c0 \uc54a\ub294\ub2e4.\"\n      },\n      {\n        \"method\": \"minimize or isolate damage\",\n        \"principle\": \"Cavitation\uc744 \ubc38\ube0c \ud45c\uba74\uc5d0\uc11c \uaca9\ub9ac\ud558\uace0 \uc601\ud5a5\uc744 \ubc1b\ub294 \ud45c\uba74\uc744 \uacbd\ud654\ud55c\ub2e4.\",\n        \"result\": \"Cavitation \uc790\uccb4\ub97c \ubc18\ub4dc\uc2dc \uc81c\uac70\ud558\uc9c0\ub294 \uc54a\uc9c0\ub9cc \uc190\uc0c1\uc744 \uc904\uc778\ub2e4.\"\n      },\n      {\n        \"method\": \"change system conditions\",\n        \"principle\": \"P2\ub97c \ub192\uc5ec Vena Contracta \uc555\ub825\uc774 Pv \uc774\ud558\ub85c \ub0b4\ub824\uac00\uc9c0 \uc54a\uac8c \ud55c\ub2e4.\",\n        \"examples\": &#91;\n          \"\ubc38\ube0c\ub97c \ub354 \ud070 \ud558\ub958 \uc815\uc555\uc218\ub450\uac00 \uc874\uc7ac\ud558\ub294 \uc704\uce58\ub85c \uc774\ub3d9\",\n          \"orifice plate \uc801\uc6a9\",\n          \"backpressure device \uc801\uc6a9\"\n        ],\n        \"caution\": \"Cavitation\uc774 \ubc38\ube0c\uc5d0\uc11c \uc624\ub9ac\ud53c\uc2a4 \ub610\ub294 \ud558\ub958 \uc81c\ud55c\uc7a5\uce58\ub85c \uc774\ub3d9\ud560 \uc218 \uc788\ub2e4.\"\n      }\n    ]\n  },\n  \"flashing\": {\n    \"definition\": \"Vena Contracta\uc5d0\uc11c \ubc1c\uc0dd\ud55c \uc99d\uae30 \uae30\ud3ec\uac00 \ubc38\ube0c \ucd9c\uad6c \uc774\ud6c4\uc5d0\ub3c4 \ubd95\uad34\ud558\uc9c0 \uc54a\uace0 \uc720\uc9c0\ub418\ub294 \ud604\uc0c1\",\n    \"pressure_condition\": \"Pvc &lt; Pv and P2 &lt; Pv\",\n    \"downstream_state\": \"liquid-vapor two-phase flow\",\n    \"damage_mechanism\": \"\uace0\uc18d \uc561\uc801\uacfc 2\uc0c1 \uc720\ub3d9\uc774 \ubc38\ube0c \ud45c\uba74\uc5d0 \ucda9\ub3cc\ud558\uc5ec \uce68\uc2dd\uc744 \ubc1c\uc0dd\uc2dc\ud0a8\ub2e4.\",\n    \"damage_appearance\": \"smooth and polished erosion\",\n    \"primary_damage_location\": \"highest velocity region, commonly at or near the plug and seat-ring seat line\",\n    \"preventability\": {\n      \"can_control_valve_prevent_flashing\": false,\n      \"reason\": &#91;\n        \"P2\ub294 \ud558\ub958 \uacf5\uc815\uacfc \ubc30\uad00\uc5d0 \uc758\ud574 \uacb0\uc815\ub41c\ub2e4.\",\n        \"Pv\ub294 \uc720\uccb4\uc640 \uc6b4\uc804\uc628\ub3c4\uc5d0 \uc758\ud574 \uacb0\uc815\ub41c\ub2e4.\",\n        \"\ub450 \ubcc0\uc218\ub294 \uc81c\uc5b4\ubc38\ube0c\uac00 \uc9c1\uc811 \uc81c\uc5b4\ud558\uc9c0 \uc54a\ub294\ub2e4.\"\n      ]\n    },\n    \"selection_principles\": &#91;\n      {\n        \"principle\": \"reduce particle impact\",\n        \"description\": \"\uc561\uc801\uc774 \ubc38\ube0c \ud45c\uba74\uc5d0 \ucda9\ub3cc\ud558\ub294 \ud69f\uc218\ub97c \uc904\uc778\ub2e4.\"\n      },\n      {\n        \"principle\": \"use hard materials\",\n        \"description\": \"\uc561\uc801 \ucda9\ub3cc\uc774 \ubd88\uac00\ud53c\ud55c \ud45c\uba74\uc5d0 \uac00\ub2a5\ud55c \ud55c \ub2e8\ub2e8\ud55c \uc7ac\ub8cc\ub97c \uc801\uc6a9\ud55c\ub2e4.\"\n      },\n      {\n        \"principle\": \"reduce erosive velocity\",\n        \"description\": \"\uc2a4\ub85c\ud2c0\ub9c1 \uc9c0\uc810 \ud558\ub958\uc758 \uc720\ub85c \uba74\uc801\uc744 \ud655\ub300\ud558\uc5ec 2\uc0c1 \uc720\ub3d9 \uc18d\ub3c4\ub97c \ub0ae\ucd98\ub2e4.\"\n      },\n      {\n        \"principle\": \"reduce flow-direction changes\",\n        \"description\": \"\uc720\ub3d9 \ubc29\ud5a5 \ubcc0\ud654\uac00 \uc801\uc740 \ubc38\ube0c \ud615\uc0c1\uc744 \uc120\uc815\ud55c\ub2e4.\"\n      }\n    ],\n    \"recommended_valve_geometries\": &#91;\n      \"sliding-stem angle valve\",\n      \"eccentric rotary plug valve\",\n      \"segmented ball valve\",\n      \"valve with expanded downstream flow area\"\n    ],\n    \"corrosion_erosion_synergy\": {\n      \"description\": \"\ubd80\uc2dd\uacfc Flashing \uce68\uc2dd\uc774 \ud568\uaed8 \ubc1c\uc0dd\ud558\uba74 \uac01\uac01\uc758 \ub2e8\ub3c5 \uc190\uc0c1\ubcf4\ub2e4 \ub354 \uc2ec\ud55c \uc190\uc0c1\uc774 \ubc1c\uc0dd\ud560 \uc218 \uc788\ub2e4.\",\n      \"handbook_example\": \"\ubb3c\uacfc \ud0c4\uc18c\uac15 \ubc38\ube0c\uc5d0\uc11c \ubd80\uc2dd\uc73c\ub85c \ud615\uc131\ub41c \uc5f0\ud55c \uc0b0\ud654\uce35\uc744 Flashing \uc720\ub3d9\uc774 \ubc18\ubcf5\uc801\uc73c\ub85c \uc81c\uac70\ud55c\ub2e4.\",\n      \"response\": \"\ubd80\uc2dd \uc5b5\uc81c\ub97c \uace0\ub824\ud55c \ubc38\ube0c \ubc14\ub514 \ubc0f \ud2b8\ub9bc \uc7ac\uc9c8\uc744 \uc120\uc815\ud55c\ub2e4.\"\n    }\n  },\n  \"comparison\": &#91;\n    {\n      \"attribute\": \"bubble generation\",\n      \"cavitation\": \"Pvc &lt; Pv\",\n      \"flashing\": \"Pvc &lt; Pv\"\n    },\n    {\n      \"attribute\": \"outlet pressure\",\n      \"cavitation\": \"P2 &gt; Pv\",\n      \"flashing\": \"P2 &lt; Pv\"\n    },\n    {\n      \"attribute\": \"bubble behavior\",\n      \"cavitation\": \"collapse after pressure recovery\",\n      \"flashing\": \"remain in downstream flow\"\n    },\n    {\n      \"attribute\": \"damage mechanism\",\n      \"cavitation\": \"bubble-collapse energy\",\n      \"flashing\": \"high-velocity two-phase erosion\"\n    },\n    {\n      \"attribute\": \"damage appearance\",\n      \"cavitation\": \"rough and cinder-like\",\n      \"flashing\": \"smooth and polished\"\n    },\n    {\n      \"attribute\": \"fundamental prevention by valve\",\n      \"cavitation\": \"possible by pressure-drop management\",\n      \"flashing\": \"not possible by the valve alone\"\n    }\n  ],\n  \"selection_workflow\": &#91;\n    \"P1, P2, operating temperature \ubc0f Pv\ub97c \ud655\uc778\ud55c\ub2e4.\",\n    \"deltaP_actual = P1 - P2\ub97c \uacc4\uc0b0\ud55c\ub2e4.\",\n    \"IEC \uc561\uccb4 \uc0ac\uc774\uc9d5\uc73c\ub85c deltaP_choked\ub97c \uacc4\uc0b0\ud55c\ub2e4.\",\n    \"deltaP_actual &gt; deltaP_choked\uc774\uba74 \ucd08\ud06c \uc720\ub3d9\uacfc \uc0c1\ubcc0\ud654 \uac00\ub2a5\uc131\uc744 \uac80\ud1a0\ud55c\ub2e4.\",\n    \"Pvc &lt; Pv\uc778\uc9c0 \ud655\uc778\ud558\uc5ec \uae30\ud3ec \uc0dd\uc131 \uc5ec\ubd80\ub97c \ud310\ub2e8\ud55c\ub2e4.\",\n    \"P2 &gt; Pv\uc774\uba74 Cavitation\uc73c\ub85c \ubd84\ub958\ud55c\ub2e4.\",\n    \"P2 &lt; Pv\uc774\uba74 Flashing\uc73c\ub85c \ubd84\ub958\ud55c\ub2e4.\",\n    \"Cavitation\uc774\uba74 \ub2e4\ub2e8 \uac10\uc555, \uc190\uc0c1 \uaca9\ub9ac \ub610\ub294 P2 \uc0c1\uc2b9\uc744 \uac80\ud1a0\ud55c\ub2e4.\",\n    \"Flashing\uc774\uba74 \uc9c1\uc120\ud615 \uc720\ub85c, \ud655\ub300\ub41c \ud558\ub958 \uc720\ub85c, \uc18d\ub3c4 \uc800\uac10 \ubc0f \uacbd\uc9c8\uc7ac\ub8cc\ub97c \uc801\uc6a9\ud55c\ub2e4.\",\n    \"\ubc38\ube0c \ud2b8\ub9bc, \ubc14\ub514 \ubc0f \uc778\uc811 \ud558\ub958 \ubc30\uad00\uc758 \uc190\uc0c1 \uac00\ub2a5\uc131\uc744 \uac80\ud1a0\ud55c\ub2e4.\",\n    \"\ubd80\uc2dd\uacfc \uce68\uc2dd\uc758 \ubcf5\ud569\uc791\uc6a9\uc744 \uace0\ub824\ud558\uc5ec \uc7ac\uc9c8\uc744 \uc120\uc815\ud55c\ub2e4.\"\n  ],\n  \"common_misconceptions\": &#91;\n    {\n      \"incorrect\": \"Cavitation\uacfc Flashing\uc740 \uae30\ud3ec\uac00 \ubc1c\uc0dd\ud558\ub294 \uc21c\uac04\ubd80\ud130 \uc11c\ub85c \ub2e4\ub978 \ud604\uc0c1\uc774\ub2e4.\",\n      \"correct\": \"\ub450 \ud604\uc0c1 \ubaa8\ub450 Pvc &lt; Pv\uc5d0\uc11c \uae30\ud3ec\uac00 \ubc1c\uc0dd\ud558\uba70, \ud558\ub958 \uc555\ub825\ud68c\ubcf5 \ud6c4 \uae30\ud3ec \uac70\ub3d9\uc73c\ub85c \uad6c\ubd84\ud55c\ub2e4.\"\n    },\n    {\n      \"incorrect\": \"P2\uac00 Pv\ubcf4\ub2e4 \ub0ae\uc73c\uba74 Cavitation\uc774 \ubc1c\uc0dd\ud55c\ub2e4.\",\n      \"correct\": \"P2 &lt; Pv\uc774\uba74 \uae30\ud3ec\uac00 \ubd95\uad34\ud558\uc9c0 \uc54a\uc73c\ubbc0\ub85c Flashing\uc774\ub2e4.\"\n    },\n    {\n      \"incorrect\": \"Anti-cavitation trim\uc73c\ub85c Flashing\uc744 \uc81c\uac70\ud560 \uc218 \uc788\ub2e4.\",\n      \"correct\": \"Flashing\uc740 P2\uc640 Pv\uac00 \uacb0\uc815\ud558\ub294 \uacf5\uc815\ud604\uc0c1\uc774\ubbc0\ub85c \ubc38\ube0c \uc790\uccb4\ub85c \uc81c\uac70\ud560 \uc218 \uc5c6\ub2e4.\"\n    },\n    {\n      \"incorrect\": \"High-recovery valve\ub294 \ubaa8\ub4e0 \uc561\uccb4 \uace0\uc555\uac15\ud558 \uc11c\ube44\uc2a4\uc5d0 \uc720\ub9ac\ud558\ub2e4.\",\n      \"correct\": \"High-recovery valve\ub294 Vena Contracta \uc555\ub825\uc774 \ub354 \ub0ae\uc544\uc838 Cavitation\uc5d0 \ucde8\uc57d\ud560 \uc218 \uc788\ub2e4.\"\n    },\n    {\n      \"incorrect\": \"Backpressure device\ub294 Cavitation\uc744 \uc2dc\uc2a4\ud15c \uc804\uccb4\uc5d0\uc11c \ubc18\ub4dc\uc2dc \uc81c\uac70\ud55c\ub2e4.\",\n      \"correct\": \"Cavitation \uc704\uce58\uac00 \ud558\ub958 \uc81c\ud55c\uc7a5\uce58\ub85c \uc774\ub3d9\ud560 \uc218 \uc788\uc73c\ubbc0\ub85c \uc804\uccb4 \uc2dc\uc2a4\ud15c\uc744 \uac80\ud1a0\ud574\uc57c \ud55c\ub2e4.\"\n    }\n  ],\n  \"exam_core_answer\": {\n    \"definition\": \"\uc81c\uc5b4\ubc38\ube0c \uc81c\ud55c\ubd80\ub97c \ud1b5\uacfc\ud55c \uc561\uccb4\ub294 Vena Contracta\uc5d0\uc11c \uc720\uc18d\uc774 \ucd5c\ub300\uac00 \ub418\uace0 \uc555\ub825\uc774 \ucd5c\uc18c\uac00 \ub41c\ub2e4. Pvc\uac00 Pv\ubcf4\ub2e4 \ub0ae\uc544\uc9c0\uba74 \uc99d\uae30 \uae30\ud3ec\uac00 \ubc1c\uc0dd\ud55c\ub2e4.\",\n    \"cavitation_statement\": \"Pvc &lt; Pv &lt; P2\uc774\uba74 \ud558\ub958 \uc555\ub825\ud68c\ubcf5 \uacfc\uc815\uc5d0\uc11c \uae30\ud3ec\uac00 \ubd95\uad34\ud558\uc5ec Cavitation\uc774 \ubc1c\uc0dd\ud55c\ub2e4.\",\n    \"flashing_statement\": \"Pvc &lt; Pv\uc774\uace0 P2 &lt; Pv\uc774\uba74 \uae30\ud3ec\uac00 \ud558\ub958\uae4c\uc9c0 \uc720\uc9c0\ub418\uc5b4 Flashing\uc774 \ubc1c\uc0dd\ud55c\ub2e4.\",\n    \"cavitation_countermeasure\": \"\uc804\uccb4 \uc555\ub825\uac15\ud558\ub97c \ub2e4\ub2e8 \ud2b8\ub9bc\uc73c\ub85c \ubd84\ud560\ud558\uc5ec \uac01 \ub2e8\uacc4\uc758 \ucd5c\uc800\uc555\ub825\uc744 Pv \uc774\uc0c1\uc73c\ub85c \uc720\uc9c0\ud55c\ub2e4.\",\n    \"flashing_countermeasure\": \"\uc9c1\uc120 \uc720\ub85c, \ud655\ub300\ub41c \ud558\ub958 \uc720\ub85c, \uc18d\ub3c4 \uc800\uac10 \ubc0f \uacbd\uc9c8\uc7ac\ub8cc\ub85c \uce68\uc2dd \uc190\uc0c1\uc744 \ucd5c\uc18c\ud654\ud55c\ub2e4.\"\n  },\n  \"keytags\": &#91;\n    \"Cavitation\",\n    \"Flashing\",\n    \"Vena Contracta\",\n    \"Choked Flow\",\n    \"Multi-stage Trim\"\n  ]\n}<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\uc81c\uc5b4\ubc38\ube0c \ud578\ub4dc\ubd81 5.14\uc5d0\uc11c\ub294 Cavitation\uacfc Flashing\uc758 \uac1c\ub150, \ubc1c\uc0dd \uc870\uac74 \ubc0f \uc190\uc0c1 \uba54\ucee4\ub2c8\uc998\uc744 \uc124\uba85\ud558\uace0 \uc788\uc2b5\ub2c8\ub2e4. \ub450 \ud604\uc0c1\uc740 \ubaa8\ub450 Pvc < Pv\uc5d0\uc11c \uae30\ud3ec\uac00 \ubc1c\uc0dd\ud558\uc9c0\ub9cc, \ud558\ub958 \uc555\ub825 \ud68c\ubcf5 \ud6c4 \uae30\ud3ec \uac70\ub3d9\uc5d0 \ub530\ub77c Cavitation \ub610\ub294 Flashing\uc73c\ub85c \uad6c\ubd84\ub429\ub2c8\ub2e4. \uc801\uc808\ud55c \uc120\ud0dd \ubc0f \ub300\ucc45\uc774 \ud544\uc694\ud569\ub2c8\ub2e4.\n<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[1185],"tags":[1353,1614,2068],"class_list":["post-9321","post","type-post","status-publish","format-standard","hentry","category-1185","tag-cavitation","tag-flashing","tag-multi-stage-trim"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/posts\/9321","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/comments?post=9321"}],"version-history":[{"count":4,"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/posts\/9321\/revisions"}],"predecessor-version":[{"id":9348,"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/posts\/9321\/revisions\/9348"}],"wp:attachment":[{"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/media?parent=9321"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/categories?post=9321"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/tags?post=9321"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}