{"id":46562,"date":"2019-10-22T16:46:56","date_gmt":"2019-10-22T15:46:56","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/quest-ce-que-le-slip-ratio-velocity-ratio-definition\/"},"modified":"2021-05-27T13:27:15","modified_gmt":"2021-05-27T12:27:15","slug":"quest-ce-que-le-slip-ratio-velocity-ratio-definition","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/fr\/quest-ce-que-le-slip-ratio-velocity-ratio-definition\/","title":{"rendered":"Qu&#8217;est-ce que la rapport de glissement &#8211; rapport de vitesse &#8211; Definition"},"content":{"rendered":"<div class=\"su-quote su-quote-style-default\">\n<div class=\"su-quote-inner su-clearfix\">Le rapport de glissement (ou rapport de vitesse) est d\u00e9fini dans un \u00e9coulement de fluide \u00e0 deux phases comme \u00e9tant le rapport entre la vitesse de la vapeur et la vitesse du liquide. G\u00e9nie thermique<\/div>\n<\/div>\n<div><\/div>\n<div><\/div>\n<div>\n<div class=\"lgc-column lgc-grid-parent lgc-grid-100 lgc-tablet-grid-100 lgc-mobile-grid-100 lgc-equal-heights lgc-first lgc-last\">\n<div class=\"inside-grid-column\">\n<h2>Param\u00e8tres de base du d\u00e9bit de fluide diphasique<\/h2>\n<p>Dans cette section, nous consid\u00e9rerons le flux simultan\u00e9 de\u00a0<strong>gaz (ou de vapeur) et d&#8217;eau liquide<\/strong>\u00a0(tel que celui rencontr\u00e9 dans\u00a0<a title=\"G\u00e9n\u00e9rateur de vapeur\" href=\"https:\/\/www.nuclear-power.com\/steam-generator\/\">les g\u00e9n\u00e9rateurs de vapeur<\/a>\u00a0et les condenseurs) dans un flux simultan\u00e9 \u00e0 travers un conduit avec une section transversale A. Les indices\u00a0<strong>\u00abv\u00bb<\/strong>\u00a0et\u00a0<strong>\u00ab\u2113\u00bb<\/strong>\u00a0indiquent la\u00a0<strong>phase vapeur<\/strong>\u00a0et\u00a0<strong>la<\/strong>\u00a0phase\u00a0<strong>liquide<\/strong>\u00a0, respectivement.\u00a0Les param\u00e8tres fondamentaux qui caract\u00e9risent ce flux sont:<\/p>\n<ul>\n<li><a title=\"Fraction nulle - \u00e9coulement diphasique\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/fluid-dynamics\/two-phase-fluid-flow\/void-fraction-two-phase-flow\/\"><strong>Fraction nulle<\/strong><\/a><\/li>\n<li><a title=\"Qualit\u00e9 statique - Qualit\u00e9 de flux\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/fluid-dynamics\/two-phase-fluid-flow\/static-quality-flow-quality\/\"><strong>Qualit\u00e9 statique<\/strong><\/a><\/li>\n<li><a title=\"Qualit\u00e9 statique - Qualit\u00e9 de flux\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/fluid-dynamics\/two-phase-fluid-flow\/static-quality-flow-quality\/\"><strong>Qualit\u00e9 du d\u00e9bit<\/strong><\/a><\/li>\n<li><a title=\"Densit\u00e9 du m\u00e9lange - D\u00e9bit diphasique\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/fluid-dynamics\/two-phase-fluid-flow\/mixture-density-two-phase-flow\/\"><strong>Densit\u00e9 du m\u00e9lange<\/strong><\/a><\/li>\n<li><a title=\"Rapport de glissement - Rapport de vitesse\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/fluid-dynamics\/two-phase-fluid-flow\/slip-ratio-velocity-ratio\/\"><strong>Rapport de glissement &#8211; Rapport de vitesse<\/strong><\/a><\/li>\n<li><a title=\"Vitesse superficielle - \u00e9coulement diphasique\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/fluid-dynamics\/two-phase-fluid-flow\/superficial-velocity-two-phase-flow\/\"><strong>Vitesse superficielle<\/strong><\/a><\/li>\n<\/ul>\n<div class=\"su-spacer\"><\/div>\n<\/div>\n<\/div>\n<div class=\"lgc-column lgc-grid-parent lgc-grid-50 lgc-tablet-grid-50 lgc-mobile-grid-100 lgc-equal-heights lgc-first\">\n<div class=\"inside-grid-column\">\n<div class=\"su-spacer\"><\/div>\n<h2>Rapport de glissement &#8211; Rapport de vitesse<\/h2>\n<p>Dans\u00a0<a title=\"D\u00e9bit de fluide diphasique\" href=\"https:\/\/www.thermal-engineering.org\/fr\/quest-ce-quun-ecoulement-de-fluide-a-deux-phases-definition\/\">un \u00e9coulement de fluide \u00e0 deux phases,<\/a>\u00a0il est pratique d&#8217;utiliser le\u00a0<strong>taux de glissement<\/strong>\u00a0.\u00a0<strong>Le rapport de glissement<\/strong>\u00a0(ou\u00a0<strong>rapport de vitesse<\/strong>\u00a0) dans un \u00e9coulement diphasique est d\u00e9fini comme le rapport de la vitesse de la phase vapeur sur la vitesse de la phase liquide.\u00a0Le taux de glissement dans un \u00e9coulement de fluide diphasique est d\u00e9fini comme:<\/p>\n<p>Dans le\u00a0<strong>mod\u00e8le d&#8217;\u00e9quilibre homog\u00e8ne (HEM)<\/strong>\u00a0de l&#8217;\u00e9coulement diphasique, le taux de glissement est par d\u00e9finition suppos\u00e9 \u00e9gal \u00e0 l&#8217;unit\u00e9 (il n&#8217;y a pas de glissement).\u00a0Cependant, la plupart des \u00e9coulements diphasiques industriels ont une vitesse diff\u00e9rente des phases gazeuse et liquide, celles-ci peuvent diff\u00e9rer consid\u00e9rablement.\u00a0Les mod\u00e8les qui expliquent l&#8217;existence du glissement sont appel\u00e9s\u00a0<strong>mod\u00e8les de flux s\u00e9par\u00e9s<\/strong>\u00a0.<\/p>\n<\/div>\n<\/div>\n<div class=\"lgc-column lgc-grid-parent lgc-grid-50 lgc-tablet-grid-50 lgc-mobile-grid-100 lgc-equal-heights lgc-last\">\n<div class=\"inside-grid-column\"><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/slip-ratio-definition.png\"><img loading=\"lazy\" class=\"size-full wp-image-14775 alignleft lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/slip-ratio-definition.png\" alt=\"rapport de glissement - d\u00e9finition\" width=\"353\" height=\"385\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/slip-ratio-definition.png\" \/><\/a><\/div>\n<\/div>\n<div class=\"lgc-column lgc-grid-parent lgc-grid-100 lgc-tablet-grid-100 lgc-mobile-grid-100 lgc-equal-heights lgc-first lgc-last\">\n<div class=\"inside-grid-column\">\n<div class=\"su-spacer\"><\/div>\n<p>Les relations entre\u00a0<strong>x, \u03b1 et S<\/strong>\u00a0peuvent \u00eatre d\u00e9duites et le r\u00e9sultat est:<a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/relations-between-quality-void-fraction-and-slip.png\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-14782 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/relations-between-quality-void-fraction-and-slip.png\" alt=\"relations entre qualit\u00e9, fraction de vide et glissement\" width=\"619\" height=\"101\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/relations-between-quality-void-fraction-and-slip.png\" \/><\/a><\/p>\n<figure id=\"attachment_14781\" class=\"wp-caption aligncenter\" aria-describedby=\"caption-attachment-14781\"><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Chart-Slip-Ratio.png\"><img loading=\"lazy\" class=\"size-full wp-image-14781 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Chart-Slip-Ratio.png\" alt=\"Effet de S sur \u03b1 vs x pour l'eau \u00e0 7 MPa. Source: Buongiorno Jacopo, D\u00e9partement des sciences et de l'ing\u00e9nierie nucl\u00e9aires du MIT, NOTES SUR LE FLUX EN DEUX PHASES\" width=\"601\" height=\"483\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Chart-Slip-Ratio.png\" \/><\/a><figcaption id=\"caption-attachment-14781\" class=\"wp-caption-text\">Effet de S sur \u03b1 vs x pour l&#8217;eau \u00e0 7 MPa.\u00a0Source: Buongiorno Jacopo, D\u00e9partement des sciences et de l&#8217;ing\u00e9nierie nucl\u00e9aires du MIT, NOTES SUR LE FLUX EN DEUX PHASES<\/figcaption><\/figure>\n<p>La raison de la d\u00e9finition de la\u00a0<strong>fraction de vide<\/strong>\u00a0et du\u00a0<strong>taux de glissement<\/strong>\u00a0est qu&#8217;ils permettent \u00e9galement de calculer la\u00a0<strong>chute<\/strong>\u00a0de\u00a0<strong>pression<\/strong>\u00a0de l&#8217;\u00e9coulement diphasique.\u00a0Plusieurs corr\u00e9lations pour le calcul du taux de glissement, S et de la fraction de vide sont pr\u00e9sent\u00e9es dans la litt\u00e9rature.\u00a0Les corr\u00e9lations suivantes sont donn\u00e9es par ordre croissant de pr\u00e9cision.<\/p>\n<div class=\"su-spacer\"><\/div>\n<p><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/homogeneous-flow-model.png\"><img loading=\"lazy\" class=\"size-full wp-image-14776 alignleft lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/homogeneous-flow-model.png\" alt=\"mod\u00e8le d'\u00e9coulement homog\u00e8ne\" width=\"191\" height=\"66\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/homogeneous-flow-model.png\" \/><\/a><\/p>\n<div class=\"su-spacer\"><\/div>\n<p><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Zivi-slip-correlation.png\"><img loading=\"lazy\" class=\"size-full wp-image-14777 alignleft lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Zivi-slip-correlation.png\" alt=\"Corr\u00e9lation de glissement Zivi\" width=\"169\" height=\"94\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Zivi-slip-correlation.png\" \/><\/a><\/p>\n<div class=\"su-spacer\"><\/div>\n<p><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Chisholm-slip-correlation.png\"><img loading=\"lazy\" class=\"size-full wp-image-14778 alignleft lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Chisholm-slip-correlation.png\" alt=\"Corr\u00e9lation de glissement de Chisholm\" width=\"207\" height=\"105\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Chisholm-slip-correlation.png\" \/><\/a><\/p>\n<div class=\"su-spacer\"><\/div>\n<p><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/smith-void-correlation.png\"><img loading=\"lazy\" class=\"size-full wp-image-14779 alignleft lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/smith-void-correlation.png\" alt=\"Smith corr\u00e9lation de vide\" width=\"457\" height=\"154\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/smith-void-correlation.png\" \/><\/a><\/p>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"inside-grid-column\"><\/div>\n<div><\/div>\n<div><\/div>\n<div><\/div>\n<div><\/div>\n<div><\/div>\n<div><\/div>\n<div><\/div>\n<div><\/div>\n<div><\/div>\n<div><\/div>\n<div><\/div>\n<div><\/div>\n<div><\/div>\n<div><\/div>\n<div>\n<p>&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.<\/p>\n<p>Cet article est bas\u00e9 sur la traduction automatique de l&#8217;article original en anglais. Pour plus d&#8217;informations, voir l&#8217;article en anglais. Pouvez vous nous aider Si vous souhaitez corriger la traduction, envoyez-la \u00e0 l&#8217;adresse: translations@nuclear-power.com ou remplissez le formulaire de traduction en ligne. Nous appr\u00e9cions votre aide, nous mettrons \u00e0 jour la traduction le plus rapidement possible. Merci<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Le rapport de glissement (ou rapport de vitesse) est d\u00e9fini dans un \u00e9coulement de fluide \u00e0 deux phases comme \u00e9tant le rapport entre la vitesse de la vapeur et la vitesse du liquide. G\u00e9nie thermique Param\u00e8tres de base du d\u00e9bit de fluide diphasique Dans cette section, nous consid\u00e9rerons le flux simultan\u00e9 de\u00a0gaz (ou de vapeur) &#8230; <a title=\"Qu&#8217;est-ce que la rapport de glissement &#8211; rapport de vitesse &#8211; Definition\" class=\"read-more\" href=\"https:\/\/www.thermal-engineering.org\/fr\/quest-ce-que-le-slip-ratio-velocity-ratio-definition\/\" aria-label=\"En savoir plus sur Qu&#8217;est-ce que la rapport de glissement &#8211; rapport de vitesse &#8211; Definition\">Lire la suite<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[8],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v15.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Qu&#039;est-ce que la rapport de glissement - rapport de vitesse - Definition<\/title>\n<meta name=\"description\" content=\"Le rapport de glissement (ou rapport de vitesse) est d\u00e9fini dans un \u00e9coulement de fluide \u00e0 deux phases comme \u00e9tant le rapport entre la vitesse de la vapeur et la vitesse du liquide. 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