{"id":9873,"date":"2026-11-10T20:33:56","date_gmt":"2026-11-10T11:33:56","guid":{"rendered":"https:\/\/now0930.pe.kr\/wordpress\/?p=9873"},"modified":"2026-11-10T20:33:56","modified_gmt":"2026-11-10T11:33:56","slug":"control-valve-cavitation-flashing-choked-flow-review","status":"publish","type":"post","link":"https:\/\/now0930.pe.kr\/wordpress\/control-valve-cavitation-flashing-choked-flow-review\/","title":{"rendered":"Cavitation\u00b7Flashing\u00b7Choked Flow \u2014 \uc81c\uc5b4\ubc38\ube0c \ubb3c\ub9ac \uc6d0\ub9ac \ubcf5\uc2b5"},"content":{"rendered":"<style>\n\/* Chapter 19 Wide \/ scoped WordPress custom HTML style *\/\n.chapter19-wide{box-sizing:border-box;display:block!important;position:static!important;left:auto!important;right:auto!important;transform:none!important;float:none!important;width:100%!important;max-width:1180px!important;margin:24px auto 36px!important;padding:32px clamp(18px,3vw,44px) 42px;border:1px solid #dbe5ee;border-radius:14px;background:#fff;color:#233447;font-family:-apple-system,BlinkMacSystemFont,\"Noto Sans KR\",\"Malgun Gothic\",sans-serif;font-size:17px;line-height:1.82;word-break:keep-all;overflow-wrap:break-word}\n.chapter19-wide *{box-sizing:border-box}.chapter19-wide h1{font-size:clamp(27px,3vw,34px);line-height:1.3;color:#163b63;margin:0 0 7px}.chapter19-wide .subtitle{color:#5e7184;font-size:15px;border-bottom:2px solid #e0eaf3;padding:0 0 16px;margin:0 0 22px}\n.chapter19-wide h2{font-size:22px;line-height:1.4;color:#153e68;border-left:5px solid #397eb8;padding-left:12px;margin:30px 0 11px}.chapter19-wide h3{font-size:18px;color:#275980;margin:16px 0 5px}.chapter19-wide p{margin:8px 0 12px}.chapter19-wide ul{padding-left:23px;margin:8px 0 14px}.chapter19-wide li{margin:3px 0}.chapter19-wide strong{color:#143d66}\n.chapter19-wide .key{padding:14px 18px;border-radius:8px;background:#eff6fc;border-left:4px solid #3179b0;margin:13px 0}.chapter19-wide .warn{padding:12px 17px;border-radius:8px;background:#fff7e9;border-left:4px solid #d59b37;margin:12px 0}.chapter19-wide .flow{border-radius:8px;background:#f5f8fc;padding:13px 15px;margin:12px 0;color:#1f4568;font-weight:600}.chapter19-wide .formula{text-align:center;font:normal 21px\/1.6 Georgia,\"Times New Roman\",serif;background:#f5f9fd;border:1px solid #dfe9f2;border-radius:7px;padding:12px 9px;margin:12px 0}.chapter19-wide .formula small{font:normal 14px\/1.5 -apple-system,BlinkMacSystemFont,\"Noto Sans KR\",sans-serif;display:block;color:#5a738a}\n.chapter19-wide .scroll-table{overflow-x:auto;margin:12px 0}.chapter19-wide table{min-width:570px;width:100%;border-collapse:collapse;font-size:16px}.chapter19-wide th,.chapter19-wide td{padding:9px 11px;text-align:left;vertical-align:top;border:1px solid #d7e4ee}.chapter19-wide th{background:#e9f2fa;color:#1c466b}.chapter19-wide .figure{margin:15px auto 20px;text-align:center}.chapter19-wide .figure img{display:block;margin:auto;max-width:630px;width:100%;height:auto;border-radius:6px;border:1px solid #e6edf4}.chapter19-wide .figure figcaption{max-width:680px;margin:7px auto 0;color:#61748a;font-size:13px;line-height:1.55}.chapter19-wide .ref{font-size:14px;border-top:1px solid #d9e3ef;margin-top:26px;padding-top:15px;color:#566a7f}.chapter19-wide .small{font-size:15px;color:#52667b}.chapter19-wide .two{display:grid;grid-template-columns:1fr 1fr;gap:12px}.chapter19-wide .two .key{margin:0}\n@media(max-width:650px){.chapter19-wide{font-size:16px;padding:19px 15px 27px}.chapter19-wide h2{font-size:20px}.chapter19-wide .two{grid-template-columns:1fr}.chapter19-wide .formula{font-size:19px}.chapter19-wide table{font-size:14px}}\n<\/style>\n<div class=\"chapter19-wide\">\n<h1>Cavitation \u00b7 Flashing \u00b7 Choked Flow<\/h1>\n<div class=\"subtitle\">Lessons in Industrial Instrumentation v2.32 \/ Chapter 27.14.2~27.14.4 \u00b7 \uc6d0\uc11c\uc640 \ud559\uc2b5 \ubb38\ub2f5 \uae30\ubc18 \ud575\uc2ec \ubcf5\uc2b5<\/div>\n<div class=\"key\"><strong>\ud575\uc2ec \uad6c\ubd84<\/strong><br \/>\n\uc561\uccb4\uac00 \ubc38\ube0c\uc758 \uc881\uc740 \uc720\ub85c\ub97c \ud1b5\uacfc\ud558\uba74 \uc720\uc18d\uc774 \uc99d\uac00\ud558\uace0 \uc815\uc555\uc774 \ub0ae\uc544\uc9c4\ub2e4. \uad6d\ubd80 \uc555\ub825\uc774 \ud3ec\ud654\uc99d\uae30\uc555 \uc544\ub798\ub85c \ub5a8\uc5b4\uc838 \uc0dd\uc131\ub41c \uae30\ud3ec\uac00 <strong>\ud558\ub958\uc5d0\uc11c \ubd95\uad34\ud558\uba74 Cavitation<\/strong>, <strong>\ud558\ub958\uc5d0\uc11c\ub3c4 \uc720\uc9c0\ub418\uba74 Flashing<\/strong>\uc774\ub2e4. \ub458 \ub2e4 Choked Flow\uc640 \uad00\ub828\ub420 \uc218 \uc788\uc9c0\ub9cc, \uc190\uc0c1 \uc6d0\ub9ac\ub294 \ub2e4\ub974\ub2e4.<\/div>\n<h2>1. \uae30\ud3ec \ubc1c\uc0dd \u2014 \uc720\uc18d, \uc555\ub825, \uc99d\uae30\uc555<\/h2>\n<p>\uc5f0\uc18d\ubc29\uc815\uc2dd\uc5d0 \ub530\ub77c \uc881\uc740 \uc720\ub85c\uc5d0\uc11c\ub294 \uc720\uc18d\uc774 \uc99d\uac00\ud558\uba70, \uae30\uacc4\uc801 \uc5d0\ub108\uc9c0 \uad00\uc810\uc5d0\uc11c \uc815\uc555\uc774 \uac10\uc18c\ud55c\ub2e4. \uc6d0\uc11c \uc5ed\uc2dc \uc555\ub825\uc744 <strong>\ud3ec\ud150\uc15c \uc5d0\ub108\uc9c0 \ud615\ud0dc<\/strong>\ub85c \uc124\uba85\ud55c\ub2e4(2213\u00b72217\ucabd).<\/p>\n<div class=\"formula\">\u03c1\u2081A\u2081v\u2081 = \u03c1\u2082A\u2082v\u2082 <small>\u03c1: \ubc00\ub3c4 \u00b7 A: \uc720\ub3d9 \ub2e8\uba74\uc801 \u00b7 v: \uc720\uc18d<\/small><\/div>\n<div class=\"formula\">P<sub>vc<\/sub> &lt; P<sub>v<\/sub>(T) \u2192 \uc561\uccb4 \uae30\ud654 <small>Pvc: \ubca0\ub098 \ucf58\ud2b8\ub799\ud0c0 \uc555\ub825 \u00b7 Pv(T): \uc628\ub3c4 T\uc5d0\uc11c\uc758 \ud3ec\ud654\uc99d\uae30\uc555(\uc808\ub300\uc555)<\/small><\/div>\n<p><strong>\uc628\ub3c4\ub97c \uc62c\ub9ac\uc9c0 \uc54a\uc544\ub3c4<\/strong> \uc555\ub825\uc744 \ub0ae\ucd94\uba74 \uae30\ud654\ud560 \uc218 \uc788\ub2e4. \uc628\ub3c4\uac00 \ub192\uc544\uc9c0\uba74 \ud3ec\ud654\uc99d\uae30\uc555\uc740 \ub192\uc544\uc9c0\ubbc0\ub85c \uc624\ud788\ub824 \ud50c\ub798\uc2f1 \uac00\ub2a5\uc131\uc774 \ucee4\uc9c4\ub2e4.<\/p>\n<p class=\"small\">Re\uac00 \ud070 \uc0b0\uc5c5 \uacf5\uc815\uc740 \ubc30\uacbd \uc124\uba85\uc73c\ub85c \uc0ac\uc6a9\ud560 \uc218 \uc788\uc9c0\ub9cc Re \uc790\uccb4\uac00 \uae30\ud654\uc758 \ud544\uc694\u00b7\ucda9\ubd84 \uc870\uac74\uc740 \uc544\ub2c8\ub2e4.<\/p>\n<h2>2. Cavitation\uacfc Flashing\uc758 \ubd84\uae30\uc810<\/h2>\n<figure class=\"figure\"><img decoding=\"async\" src=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2026\/11\/control-valve-cavitation-flashing-choked-flow-review-26ebd8cdf71a1d1b.jpg\" alt=\"\ubca0\ub098 \ucf58\ud2b8\ub799\ud0c0 \uc555\ub825\uacfc \ud558\ub958 \uc555\ub825\uc5d0 \ub530\ub978 \uce90\ube44\ud14c\uc774\uc158 \ubc0f \ud50c\ub798\uc2f1 \uc870\uac74\" style=\"max-width:630px;width:100%;height:auto;\"><figcaption>\uc555\ub825 \uc870\uac74 \uc694\uc57d(\ud559\uc2b5\uc6a9 \uc7ac\uc791\uc131). Pv\ub294 \uc628\ub3c4\uc5d0 \ub530\ub978 \ud3ec\ud654\uc99d\uae30\uc555\uc774\uba70 \ubaa8\ub4e0 P\ub294 \uc808\ub300\uc555\uc774\ub2e4.<\/figcaption><\/figure>\n<div class=\"scroll-table\">\n<table>\n<thead>\n<tr>\n<th>\ud56d\ubaa9<\/th>\n<th>Cavitation<\/th>\n<th>Flashing<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\ud558\ub958 \uc870\uac74<\/td>\n<td>P<sub>vc<\/sub> &lt; P<sub>v<\/sub> &lt; P\u2082<\/td>\n<td>P<sub>vc<\/sub> &lt; P<sub>v<\/sub>, P\u2082 &lt; P<sub>v<\/sub><\/td>\n<\/tr>\n<tr>\n<td>\uae30\ud3ec \uac70\ub3d9<\/td>\n<td>\ud558\ub958 \uc555\ub825 \ud68c\ubcf5 \u2192 \uc751\ucd95\u00b7\ubd95\uad34<\/td>\n<td>\ud558\ub958\uc5d0\uc11c\ub3c4 \uc99d\uae30 \uc720\uc9c0<\/td>\n<\/tr>\n<tr>\n<td>\ub300\ud45c \uc190\uc0c1<\/td>\n<td>\uad6d\ubd80 \ucda9\uaca9 \u2192 <strong>Pitting<\/strong><\/td>\n<td>\uace0\uc18d 2\uc0c1 \uc720\ub3d9\uc758 \uc561\uccb4 \ucda9\ub3cc \u2192 <strong>Erosion<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p class=\"small\">\uc6d0\uc11c 27.14.2\ub294 \uc720\ub85c \ub0b4\ubd80\uc5d0\uc11c <em>\ucd5c\ucd08\ub85c \uae30\ud654\ud558\ub294 \ud604\uc0c1<\/em>\ub3c4 flashing\uc774\ub77c\uace0 \ubd80\ub978\ub2e4. \uc5ec\uae30\uc11c\ub294 \ud558\ub958\uc5d0\uc11c \uae30\ud3ec\uac00 \uc720\uc9c0\ub418\ub294 \ud50c\ub798\uc2f1\uacfc \uc7ac\uc751\ucd95\ud558\ub294 \uce90\ube44\ud14c\uc774\uc158\uc744 \uad6c\ubd84\ud55c\ub2e4. P\u2082 = Pv\uc778 \uacbd\uacc4 \uc0c1\ud0dc\ub294 \uc6b4\uc804 \uc870\uac74\uc744 \ucd94\uac00 \ud655\uc778\ud574\uc57c \ud55c\ub2e4.<\/p>\n<h2>3. Cavitation \u2014 \uc65c \uae30\ud3ec \ubd95\uad34\uac00 Pitting\uc744 \ub9cc\ub4dc\ub294\uac00?<\/h2>\n<div class=\"flow\">\uc555\ub825 \ud68c\ubcf5 \u2192 \uc99d\uae30 \uae30\ud3ec \uc751\ucd95 \u2192 \uc8fc\ubcc0 \uc555\ub825 \ucc28\ub85c \uc561\uccb4\uac00 \uae30\ud3ec \ucabd\uc73c\ub85c \uae09\uac00\uc18d \u2192 \ube44\ub300\uce6d \ubd95\uad34\u00b7Microjet \/ \uc555\ub825\ud30c \u2192 \uae08\uc18d\uc758 \uad6d\ubd80 \ucda9\uaca9\uacfc Pitting<\/div>\n<p>\uae08\uc18d \ubcbd \uac00\uae4c\uc774\uc5d0\uc11c\ub294 \uae30\ud3ec\uac00 \uc0ac\ubc29\uc5d0\uc11c \ub611\uac19\uc774 \uc904\uc5b4\ub4e4\uc9c0 \uc54a\uc744 \uc218 \uc788\ub2e4. \ud55c\ucabd\uc774 \ub354 \ube60\ub974\uac8c \ucc0c\uadf8\ub7ec\uc9c0\ub294 <strong>\ube44\ub300\uce6d \ubd95\uad34<\/strong> \uc911 \uace0\uc18d \uc561\uccb4 \uc81c\ud2b8(Microjet)\uac00 \ud615\uc131\ub418\uc5b4 \ubcbd\uba74\uc744 \ub54c\ub9b0\ub2e4.<\/p>\n<div class=\"warn\"><strong>\ubb38\ub2f5\uc5d0\uc11c \uc218\uc815\ud55c \uc0dd\uac01:<\/strong> \uc99d\uae30 \uc751\ucd95 \uc2dc \ubc29\ucd9c\ub418\ub294 <em>\uc7a0\uc5f4\uc774 \ud3ed\ubc1c\ud558\uc5ec<\/em> \ucda9\uaca9\ud30c\uac00 \ub418\ub294 \uac83\uc774 \uc544\ub2c8\ub2e4. \uc8fc\ub41c \uae30\uacc4\uc801 \ucda9\uaca9 \uc5d0\ub108\uc9c0\ub294 <strong>\uae30\ud3ec \uc548\ud30e\uc758 \uc555\ub825 \ucc28\uac00 \uc8fc\ubcc0 \uc561\uccb4\ub97c \uac00\uc18d<\/strong>\uc2dc\ud0a4\ub294 \ub370\uc11c \ub098\uc628\ub2e4.<\/div>\n<figure class=\"figure\"><img decoding=\"async\" src=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2026\/11\/control-valve-cavitation-flashing-choked-flow-review-5c3e287348063a6e.jpg\" alt=\"\uc6d0\uc11c 2218\ucabd\uc758 \uc190\uc0c1\ub41c \ubc38\ube0c \ud50c\ub7ec\uadf8\uc640 \uce90\ube44\ud14c\uc774\uc158 Pitting\uc774 \ubc1c\uc0dd\ud55c \uc2dc\ud2b8 \uc0ac\uc9c4\" style=\"max-width:630px;width:100%;height:auto;\"><figcaption>\uc6d0\uc11c 2218\ucabd: \uc88c\uce21 \ud50c\ub7ec\uadf8\ub294 \uc0c1\ub300\uc801\uc73c\ub85c \ub9e4\ub044\ub7ec\uc6b4 \ud50c\ub798\uc2f1 \ub9c8\ubaa8, \uc6b0\uce21 \uc2dc\ud2b8 \ub0b4\ubd80\ub294 \uad6d\ubd80\uc801\uc778 Pitting\uc774 \ub69c\ub837\ud558\ub2e4. \uc6d0\uc11c\ub294 \ud55c \ubc38\ube0c\uc5d0 \ub450 \uc190\uc0c1\uc774 \ud568\uaed8 \uc874\uc7ac\ud55c\ub2e4\uace0 \uc124\uba85\ud55c\ub2e4.<\/figcaption><\/figure>\n<p class=\"small\">Pitting\uc740 \ud45c\uba74\uc774 \uc791\uac8c \ud328\uc774\ub294 \uc190\uc0c1\uc774\uba70, Pinhole(\uad00\ud1b5 \uad6c\uba4d)\uacfc \ubc18\ub4dc\uc2dc \uac19\uc740 \ub73b\uc740 \uc544\ub2c8\ub2e4.<\/p>\n<h2>4. Flashing \u2014 \uae30\ud3ec\uac00 \ubd95\uad34\ud558\uc9c0 \uc54a\ub294\ub370\ub3c4 \uc65c Erosion\uc774 \uc0dd\uae30\ub294\uac00?<\/h2>\n<p>\uae30\ud3ec\ub294 <strong>\uc561\uccb4 \uc548\uc758 \uc99d\uae30 \ubc29\uc6b8<\/strong>, \uc561\uc801(Droplet)\uc740 <strong>\uc99d\uae30 \uc18d\uc758 \uc791\uc740 \uc561\uccb4 \ubc29\uc6b8<\/strong>\uc774\ub2e4. \ud50c\ub798\uc2f1\uc5d0\uc11c\ub294 \uace0\uc18d \uc99d\uae30\u00b7\uc561\uccb4\uc758 2\uc0c1 \uc720\ub3d9\uc774 \ud615\uc131\ub418\uace0, \uc561\uccb4\uac00 \uc561\uc801\uc73c\ub85c \ubd84\uc0b0\ub420 \uc218 \uc788\ub2e4.<\/p>\n<div class=\"flow\">\uae30\ud654\u00b7\uc99d\uae30\uc0c1 \ud33d\ucc3d \u2192 \uace0\uc18d \uae30\uc561 2\uc0c1 \uc720\ub3d9 \u2192 \uc561\uccb4\u00b7\uc561\uc801\uc758 \ud50c\ub7ec\uadf8\/\uc2dc\ud2b8\/\ubc30\uad00 \ucda9\ub3cc \u2192 \ubc18\ubcf5 \ub9c8\ubaa8\u00b7\uac10\uc721(Erosion)<\/div>\n<div class=\"formula\">m = \u03c1V, &nbsp; \ucda9\uaca9\ub7c9 J = \u0394(mv) <small>\uac19\uc740 \ubd80\ud53c\u00b7\uc18d\ub3c4\ub77c\uba74 \ubc00\ub3c4\uac00 \ud070 \uc561\uccb4\uac00 \ub354 \ud070 \uc6b4\ub3d9\ub7c9\uc744 \uc804\ub2ec\ud560 \uc218 \uc788\ub2e4.<\/small><\/div>\n<div class=\"warn\"><strong>\ubb38\ub2f5\uc5d0\uc11c \uc218\uc815\ud55c \uc0dd\uac01:<\/strong> \u201c\uae30\ud3ec\uac00 \ubcbd\uc5d0 \uacc4\uc18d \uc555\ub825\uc744 \uac00\ud574\uc11c \uce68\uc2dd\ub41c\ub2e4\u201d\ubcf4\ub2e4\ub294 <strong>\uace0\uc18d \uc561\uccb4\u00b7\uc561\uc801\uc774 \ucda9\ub3cc\ud574\uc11c \uce68\uc2dd\ub41c\ub2e4<\/strong>\uac00 \uc6d0\uc11c\uc758 \uc124\uba85\uacfc \ub9de\ub2e4. \uce68\uc2dd\uc774 \ubc1c\uc0dd\ud558\uae30 \uc704\ud574 \uc561\uc801\uc774 \uc74c\uc18d\uc774\uc5b4\uc57c \ud558\ub294 \uac83\uc740 \uc544\ub2c8\ub2e4.<\/div>\n<figure class=\"figure\"><img decoding=\"async\" src=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2026\/11\/control-valve-cavitation-flashing-choked-flow-review-c499fedc71581a1c.jpg\" alt=\"\uc6d0\uc11c 2214\ucabd \ud50c\ub798\uc2f1\uc5d0 \uc758\ud574 \uc2ec\ud558\uac8c \uce68\uc2dd\ub41c \uc81c\uc5b4\ubc38\ube0c \ud50c\ub7ec\uadf8\" style=\"max-width:630px;width:100%;height:auto;\"><figcaption>\uc6d0\uc11c 2214\ucabd: \ud50c\ub798\uc2f1\uc73c\ub85c \uc2ec\ud558\uac8c \uce68\uc2dd\ub41c \ucf00\uc774\uc9c0 \uac00\uc774\ub4dc \uae00\ub85c\ube0c \ubc38\ube0c \ud50c\ub7ec\uadf8.<\/figcaption><\/figure>\n<h2>5. \uae30\ud654\uc7a0\uc5f4\uacfc \uc628\ub3c4 \u2014 \ub2e8\uc5f4\uc740 \ub4f1\uc628\uc774 \uc544\ub2c8\ub2e4<\/h2>\n<p>\uae30\ud654\uc5d0\ub294 \uc5d0\ub108\uc9c0\uac00 \ud544\uc694\ud558\ub2e4. \uc678\ubd80\uc5d0\uc11c \uc5f4\uc744 \uacf5\uae09\ud558\uc9c0 \uc54a\ub294 \uac10\uc555 \uacfc\uc815\uc5d0\uc11c\ub294 \uc720\uccb4 \uc790\uc2e0\uc758 \uc5d0\ub108\uc9c0\uac00 \uae30\ud654\uc5d0 \uc0ac\uc6a9\ub418\ubbc0\ub85c, \uc77c\ubd80 \uc561\uccb4\uac00 \uc99d\uae30\uac00 \ub418\uba74\uc11c <strong>\ub0a8\uc544 \uc788\ub294 \uc561\uccb4\uc758 \uc628\ub3c4\uac00 \ub0ae\uc544\uc9c8 \uc218 \uc788\ub2e4<\/strong>.<\/p>\n<div class=\"flow\">\uc555\ub825 \uac10\uc18c \u2192 \uae30\ud654 \uc2dc\uc791 \u2192 \uc7a0\uc5f4\uc5d0 \ud544\uc694\ud55c \uc5d0\ub108\uc9c0 \uc7ac\ubd84\ubc30 \u2192 \uc561\uccb4 \ub0c9\uac01 \uac00\ub2a5<\/div>\n<p>\ub2e8\uc5f4\uc740 \uc678\ubd80 \uc5f4 \uad50\ud658\uc774 \uc5c6\ub294 \uac83(<strong>Q = 0<\/strong>)\uc774\uba70, \ub4f1\uc628\uc740 \uc628\ub3c4\uac00 \uc77c\uc815\ud55c \uac83\uc774\ub2e4. \uc774\uc0c1\uc801\uc778 \ub2e8\uc5f4 \ubc38\ube0c \uc2a4\ub85c\ud2c0\ub9c1\uc5d0\uc11c\ub294 \uc6b4\ub3d9\u00b7\uc704\uce58\uc5d0\ub108\uc9c0 \ubcc0\ud654\uac00 \uc791\uc73c\uba74 <strong>h\u2081 \u2248 h\u2082<\/strong>(\ub4f1\uc5d4\ud0c8\ud53c)\ub85c \uadfc\uc0ac\ud55c\ub2e4.<\/p>\n<p class=\"small\">PV = nRT\ub294 \uc774\uc0c1\uae30\uccb4 \uc0c1\ud0dc\ubc29\uc815\uc2dd\uc774\ub2e4. \uc561\uccb4 \uae30\ud654\uc640 \uc7a0\uc5f4\uc744 \uc774 \uc2dd \ud558\ub098\ub9cc\uc73c\ub85c \uacc4\uc0b0\ud560 \uc218 \uc5c6\ub2e4.<\/p>\n<h2>6. Critical Flow = Choked Flow \u2014 \uc555\ub825\ud30c\uc640 \uc720\uc18d<\/h2>\n<p><strong>\uc0c1\ub958 \uc555\ub825 P\u2081\uacfc \ubc38\ube0c \uac1c\ub3c4\ub97c \uc77c\uc815\ud558\uac8c \ub458 \ub54c, \ud558\ub958 \uc555\ub825 P\u2082\ub97c \ub354 \ub0ae\ucdb0\ub3c4 \uc720\ub7c9\uc774 \uac70\uc758 \uc99d\uac00\ud558\uc9c0 \uc54a\ub294 \uc0c1\ud0dc<\/strong>\ub2e4(\uc6d0\uc11c 2224~2225\ucabd).<\/p>\n<div class=\"formula\">Q \u221d \u221a(P\u2081 \u2212 P\u2082) &nbsp; (\ube44\uc784\uacc4 \uc561\uccb4 \uc720\ub3d9\uc5d0\uc11c) <small>\uc784\uacc4\uc720\ub3d9\uc5d0 \ub4e4\uc5b4\uc11c\uba74 \uc774 \ub2e8\uc21c \uad00\uacc4\ub97c \uadf8\ub300\ub85c \uc801\uc6a9\ud560 \uc218 \uc5c6\ub2e4.<\/small><\/div>\n<p><strong>\uc74c\uc18d(c)<\/strong>\uc740 \uc561\uccb4 \uc790\uccb4\uac00 \ud750\ub974\ub294 \uc18d\ub3c4\uac00 \uc544\ub2c8\ub77c, \uc720\uccb4 \ub0b4\ubd80\uc5d0\uc11c <strong>\uc791\uc740 \uc555\ub825 \ubcc0\ud654\uac00 \uc804\ub2ec\ub418\ub294 \uc18d\ub3c4<\/strong>\ub2e4. \uc720\uccb4\uac00 \ud558\ub958\ub85c \uc18d\ub3c4 v\ub85c \ud750\ub97c \ub54c, \uc0c1\ub958 \ubc29\ud5a5 \uc555\ub825\ud30c\ub294 \uad00 \uae30\uc900\uc73c\ub85c <strong>c \u2212 v<\/strong>\uc758 \uc18d\ub3c4\ub85c \uc6c0\uc9c1\uc778\ub2e4.<\/p>\n<ul>\n<li>v &lt; c : \ud558\ub958\uc758 \uc791\uc740 \uc555\ub825 \ubcc0\ud654\uac00 \uc0c1\ub958\ub85c \uc804\ud574\uc9c8 \uc218 \uc788\ub2e4.<\/li>\n<li>v = c : \ud574\ub2f9 \uad6d\ubd80 \uad6c\uac04\uc5d0\uc11c\ub294 \uc0c1\ub958\ub85c \uc804\ud30c\ud558\uc9c0 \ubabb\ud558\ub294 \uc784\uacc4 \uc0c1\ud0dc\uac00 \ub41c\ub2e4.<\/li>\n<\/ul>\n<p>\uae30\ud3ec\uac00 \uc11e\uc778 \ud63c\ud569\ubb3c\uc740 \uc555\ucd95\ub418\uae30 \uc26c\uc6cc <strong>\ud63c\ud569\ubb3c\uc758 \uc74c\uc18d\uc774 \ud06c\uac8c \ub0ae\uc544\uc9c8 \uc218 \uc788\ub2e4<\/strong>. \ub2e4\ub9cc \uc561\uccb4 \ubc38\ube0c\uc758 2\uc0c1 Choked Flow\ub294 \uae30\ud654\u00b7\uc751\ucd95\uacfc \uc555\ub825\ud68c\ubcf5\uc758 \uc601\ud5a5\ub3c4 \ubc1b\uc73c\ubbc0\ub85c \uc5b8\uc81c\ub098 v = c \ud558\ub098\ub9cc\uc73c\ub85c \ud310\uc815\ud558\uc9c0 \uc54a\ub294\ub2e4. <strong>\uce90\ube44\ud14c\uc774\uc158\uc5d0\uc11c\ub3c4<\/strong> \uae30\ud3ec\uac00 \uc874\uc7ac\ud558\ub294 \uad6d\ubd80 \uad6c\uac04\uc5d0\uc11c \uc720\ub7c9 \ud55c\uacc4\uac00 \uc0dd\uae38 \uc218 \uc788\ub2e4.<\/p>\n<figure class=\"figure\"><img decoding=\"async\" src=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2026\/11\/control-valve-cavitation-flashing-choked-flow-review-5790a1f2b34e6ee5.jpg\" alt=\"\uc6d0\uc11c 2225\ucabd \ucc28\uc555\uc774 \uc99d\uac00\ud574\ub3c4 \uc720\ub7c9\uc774 \uc77c\uc815\ud55c Choked Flow \uadf8\ub798\ud504\" style=\"max-width:630px;width:100%;height:auto;\"><figcaption>\uc6d0\uc11c 2225\ucabd: \uc774\ub860\uc801\uc73c\ub85c \ucc28\uc555 \uc99d\uac00\uc640 \ud568\uaed8 \uc720\ub7c9\uc774 \uc99d\uac00\ud558\uc9c0\ub9cc, \uc2e4\uc81c\ub85c\ub294 Choked Flow \uc774\ud6c4 \uc720\ub7c9\uc774 \uac70\uc758 \uc77c\uc815\ud574\uc9c0\ub294 \uac1c\ub150\ub3c4.<\/figcaption><\/figure>\n<p class=\"small\">\uc218\uaca9\uc791\uc6a9\uc740 \uc555\ub825\ud30c\uac00 \uc0c1\ub958\ub85c \uc804\ud30c\ub418\ub294 \uacfc\ub3c4\ud604\uc0c1\uc774\ub2e4. \u0394P = \u2212\u03c1a\u0394v(a: \ubc30\uad00\uc5d0\uc11c\uc758 \uc555\ub825\ud30c \uc18d\ub3c4). Choked Flow\ub294 \ubc18\ub300\ub85c \uad6d\ubd80 \uc784\uacc4 \uad6c\uac04\uc5d0\uc11c \ud558\ub958 \uc555\ub825 \uad50\ub780\uc774 \uc0c1\ub958\ub85c \uc804\ub2ec\ub418\uc9c0 \ubabb\ud55c\ub2e4\ub294 \uad00\uc810\uacfc \uc5f0\uacb0\ub41c\ub2e4.<\/p>\n<h2>7. \uc65c \uc800\uac10 \ub300\ucc45\uc774 \ub2e4\ub978\uac00?<\/h2>\n<div class=\"scroll-table\">\n<table>\n<thead>\n<tr>\n<th>\ubb38\uc81c<\/th>\n<th>\uc6d0\ub9ac \uc911\uc2ec\uc758 \ub300\uc751<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Cavitation \ubc29\uc9c0\u00b7\uc800\uac10<\/td>\n<td>\ub2e4\ub2e8 \uac10\uc555, \uc801\uc808\ud55c \uc555\ub825\ud68c\ubcf5 \ud2b9\uc131(F<sub>L<\/sub>)\uc744 \uac00\uc9c4 \ubc38\ube0c \ubc0f Trim, \uad6d\ubd80 \uc555\ub825\uc774 Pv \uc544\ub798\ub85c \ub5a8\uc5b4\uc9c0\uc9c0 \uc54a\ub3c4\ub85d \uc124\uacc4<\/td>\n<\/tr>\n<tr>\n<td>\uae30\ud3ec \ubd95\uad34 \uc704\uce58 \uc81c\uc5b4<\/td>\n<td>\ud53c\ud560 \uc218 \uc5c6\ub294 \uacbd\uc6b0 \ubd95\uad34 \uc704\uce58\ub97c \uc911\uc694\ud55c \uc2dc\ud2b8\u00b7\ud50c\ub7ec\uadf8\uc5d0\uc11c \ub5a8\uc5b4\uc9c4 \uacf3\uc73c\ub85c \uc774\ub3d9(\uc6d0\uc11c 2223\ucabd)<\/td>\n<\/tr>\n<tr>\n<td>Flashing \uc790\uccb4\uc758 \ubc29\uc9c0<\/td>\n<td>\uacf5\uc815\uc774 \ud5c8\uc6a9\ud558\uba74 <strong>P\u2082 \uc0c1\uc2b9<\/strong> \ub610\ub294 <strong>\uc628\ub3c4 \ud558\uac15(\u2192 Pv \ud558\uac15)<\/strong>. P\u2082 &lt; Pv \uc0c1\ud0dc\uc5d0\uc11c\ub294 \ub2e4\ub2e8 \uac10\uc555\ub9cc\uc73c\ub85c \ud50c\ub798\uc2f1\uc744 \uc81c\uac70\ud560 \uc218 \uc5c6\uc74c<\/td>\n<\/tr>\n<tr>\n<td>Flashing \uce68\uc2dd \uc644\ud654<\/td>\n<td>\uc561\uc801 \ucda9\ub3cc\u00b7\uc18d\ub3c4\ub97c \uc904\uc774\ub294 \uc720\ub85c \uc124\uacc4, \uc801\uc808\ud55c \ubc30\uad00 \uce58\uc218 \ubc0f \ub0b4\uce68\uc2dd \uc7ac\ub8cc \uc120\uc815<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<figure class=\"figure\"><img decoding=\"async\" src=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2026\/11\/control-valve-cavitation-flashing-choked-flow-review-cb11b979246e248f.jpg\" alt=\"\uc6d0\uc11c 2220\ucabd \ub2e8\uc77c \uac10\uc555\uacfc \ub2e4\ub2e8 \uac10\uc555\uc758 \uad6d\ubd80 \uc555\ub825 \ud504\ub85c\ud30c\uc77c \ube44\uad50\" style=\"max-width:630px;width:100%;height:auto;\"><figcaption>\uc6d0\uc11c 2220\ucabd: \ub3d9\uc77c\ud55c \ucd1d \ucc28\uc555\uc744 \uc5ec\ub7ec \ub2e8\uacc4\uc5d0 \ubd84\ubc30\ud558\uba74 \uad6d\ubd80 \uc555\ub825\uc758 \ucd5c\uc800\uc810\uc744 \ub192\uc5ec \uae30\ud654\ub97c \uc904\uc77c \uc218 \uc788\ub2e4.<\/figcaption><\/figure>\n<div class=\"key\"><strong>\ucd5c\uc885 \uae30\uc5b5:<\/strong> Cavitation\uc740 <strong>\uae30\ud3ec \ubd95\uad34\uc758 \ucda9\uaca9 \u2192 Pitting<\/strong>, Flashing\uc740 <strong>\uc9c0\uc18d\ub418\ub294 \uace0\uc18d 2\uc0c1 \uc720\ub3d9\u00b7\uc561\uc801 \ucda9\ub3cc \u2192 Erosion<\/strong>. Choked Flow\ub294 <strong>\ud558\ub958 \uc555\ub825\uc744 \ub354 \ub0ae\ucdb0\ub3c4 \uc720\ub7c9\uc774 \ub298\uc9c0 \uc54a\ub294 \uc0c1\ud0dc<\/strong>\ub2e4. \uae30\ud654\ub294 Pv\uc640 \uc2e4\uc81c \uc555\ub825\uc758 \ube44\uad50\ub85c \ud310\ub2e8\ud55c\ub2e4.<\/div>\n<div class=\"ref\"><strong>\uad50\uc7ac \ubc0f \uadf8\ub9bc \ucd9c\ucc98<\/strong><br \/>\nTony R. Kuphaldt, <em>Lessons in Industrial Instrumentation<\/em>, version 2.32 (2019), Chapter 27.14.2 Flashing (pp.2213\u20132216), 27.14.3 Cavitation (pp.2217\u20132223), 27.14.4 Choked Flow (pp.2224\u20132225).<br \/>\n\uadf8\ub9bc\uc740 \uc6d0\uc11c p.2214, p.2218, p.2220, p.2225 \uc77c\ubd80\ub97c \ubc1c\ucdcc\u00b7\uc7ac\ub2e8\u00b7\ud06c\uae30 \uc870\uc808\ud588\uc73c\uba70, \uc555\ub825 \uc870\uac74 \uc694\uc57d \uc774\ubbf8\uc9c0\ub294 \ud559\uc2b5\uc6a9\uc73c\ub85c \uc0c8\ub85c \uc791\uc131\ud568. License: <a href=\"https:\/\/creativecommons.org\/licenses\/by\/4.0\/\" target=\"_blank\" rel=\"noopener noreferrer\">CC BY 4.0<\/a>.<br \/>\n<strong>\uac80\ud1a0 \uba54\ubaa8:<\/strong> p.2217\uc758 \uc555\ub825\uc2dd\uc740 PDF \ud14d\uc2a4\ud2b8 \ucd94\ucd9c \uc2dc \u201cP = FA\u201d\ucc98\ub7fc \ubcf4\uc77c \uc218 \uc788\uc73c\ub098, \uc6d0\ubcf8 \uc778\uc1c4\uc2dd\uc740 <strong>P = F\/A<\/strong>\ub85c \uc815\uc0c1 \ud45c\uc2dc\ub41c\ub2e4. \uc774 \ud56d\ubaa9\uc744 \uc6d0\uc11c \uc624\ub958\ub85c \ud310\uc815\ud558\uc9c0 \uc54a\ub294\ub2e4.<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\uc81c\uc5b4\ubc38\ube0c Vena Contracta \uae30\ud654, \uae30\ud3ec \ubd95\uad34\uc640 Microjet\u00b7Pitting, \ud50c\ub798\uc2f1 \uc561\uc801 \uce68\uc2dd, \uae30\ud654\uc7a0\uc5f4\uacfc \uc784\uacc4\uc720\ub3d9\uc744 \uad50\uc7ac\uc640 \ud559\uc2b5 \ubb38\ub2f5\uc73c\ub85c \uc815\ub9ac.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_hide_featured_image":false,"_jetpack_featured_image_duplicate_dismissed":0,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[1185],"tags":[1353,2067,1614,2287],"wpgpxmaps_activity":[],"class_list":["post-9873","post","type-post","status-publish","format-standard","hentry","category-1185","tag-cavitation","tag-choked-flow","tag-flashing","tag-pressure-wave"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/posts\/9873","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=9873"}],"version-history":[{"count":2,"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/posts\/9873\/revisions"}],"predecessor-version":[{"id":9876,"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/posts\/9873\/revisions\/9876"}],"wp:attachment":[{"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/media?parent=9873"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/categories?post=9873"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/tags?post=9873"},{"taxonomy":"wpgpxmaps_activity","embeddable":true,"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/wpgpxmaps_activity?post=9873"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}