{"id":46530,"date":"2019-10-22T15:22:57","date_gmt":"2019-10-22T14:22:57","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/quel-est-le-nombre-de-cavitation-definition\/"},"modified":"2019-10-22T15:22:57","modified_gmt":"2019-10-22T14:22:57","slug":"quel-est-le-nombre-de-cavitation-definition","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/fr\/quel-est-le-nombre-de-cavitation-definition\/","title":{"rendered":"Quel est le nombre de cavitation – D\u00e9finition"},"content":{"rendered":"
\n
Le nombre de cavitation ou param\u00e8tre de cavitation est un nombre sans dimension.\u00a0Il caract\u00e9rise le fait que la pression dans le liquide est proche de la pression de vapeur.\u00a0G\u00e9nie thermique<\/span><\/div>\n<\/div>\n
<\/div>\n
\n
\n
<\/div>\n

Cavitation dans les pompes centrifuges<\/span><\/h2>\n

\"cavitation<\/a>Les principaux endroits o\u00f9 il y a de la\u00a0<\/span>cavitation<\/span><\/strong><\/a>\u00a0sont les pompes,\u00a0<\/span>les\u00a0<\/span>roues<\/span><\/a>\u00a0ou les h\u00e9lices<\/span><\/strong>\u00a0.\u00a0Dans les pompes centrifuges, la cavitation r\u00e9sulte d’une\u00a0<\/span>r\u00e9duction de la pression d’aspiration<\/span><\/strong>\u00a0, d’une\u00a0<\/span>augmentation de la temp\u00e9rature d’aspiration<\/span><\/strong>\u00a0ou d’une\u00a0<\/span>augmentation du d\u00e9bit<\/span><\/strong>\u00a0au-dessus de celle pour laquelle la pompe a \u00e9t\u00e9 con\u00e7ue.<\/span><\/p>\n

<\/div>\n<\/div>\n<\/div>\n
\n
\n
<\/div>\n

Nombre de cavitation<\/span><\/h2>\n

Le\u00a0<\/span>nombre de cavitation (Ca)<\/span><\/strong>\u00a0ou\u00a0<\/span>param\u00e8tre de cavitation<\/span><\/strong>\u00a0est un nombre sans dimension utilis\u00e9 dans les calculs d’\u00e9coulement.\u00a0Il est classique de caract\u00e9riser le fait que la pression dans le flux de liquide est proche de la pression de vapeur (et donc du potentiel de cavitation) au moyen du nombre de cavitation.<\/span><\/p>\n

Le nombre de cavitation peut \u00eatre exprim\u00e9 par:<\/span><\/p>\n

\"nombre<\/a><\/p>\n

o\u00f9<\/span><\/p>\n

CA = num\u00e9ro de cavitation<\/span><\/em><\/p>\n

p = pression locale (Pa)<\/span><\/em><\/p>\n

p\u00a0<\/span><\/em>v<\/span><\/sub><\/em>\u00a0= pression de vapeur du fluide (Pa)<\/span><\/em><\/p>\n

\u03c1 = masse volumique du fluide (kg \/ m\u00a0<\/span><\/em>3<\/span><\/sup><\/em>\u00a0)<\/span><\/em><\/p>\n

v = vitesse du fluide (m \/ s)<\/span><\/em><\/p>\n<\/div>\n<\/div>\n

<\/div>\n
<\/div>\n
<\/div>\n
\n

……………………………………………………………………………………………………………………………….<\/p>\n

Cet article est bas\u00e9 sur la traduction automatique de l’article original en anglais. Pour plus d’informations, voir l’article en anglais. Pouvez vous nous aider Si vous souhaitez corriger la traduction, envoyez-la \u00e0 l’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":"

Le nombre de cavitation ou param\u00e8tre de cavitation est un nombre sans dimension.\u00a0Il caract\u00e9rise le fait que la pression dans le liquide est proche de la pression de vapeur.\u00a0G\u00e9nie thermique Cavitation dans les pompes centrifuges Les principaux endroits o\u00f9 il y a de la\u00a0cavitation\u00a0sont les pompes,\u00a0les\u00a0roues\u00a0ou les h\u00e9lices\u00a0.\u00a0Dans les pompes centrifuges, la cavitation r\u00e9sulte d’une\u00a0r\u00e9duction … 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":"\nQuel est le nombre de cavitation - D\u00e9finition<\/title>\n<meta name=\"description\" content=\"Le nombre de cavitation ou param\u00e8tre de cavitation est un nombre sans dimension. Il caract\u00e9rise le fait que la pression dans le liquide est proche de la pression de vapeur. G\u00e9nie thermique\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.thermal-engineering.org\/fr\/quel-est-le-nombre-de-cavitation-definition\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Quel est le nombre de cavitation - D\u00e9finition\" \/>\n<meta property=\"og:description\" content=\"Le nombre de cavitation ou param\u00e8tre de cavitation est un nombre sans dimension. Il caract\u00e9rise le fait que la pression dans le liquide est proche de la pression de vapeur. G\u00e9nie thermique\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.thermal-engineering.org\/fr\/quel-est-le-nombre-de-cavitation-definition\/\" \/>\n<meta property=\"og:site_name\" content=\"Thermal Engineering\" \/>\n<meta property=\"article:published_time\" content=\"2019-10-22T14:22:57+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/cavitation-damaged-impeller-min-300x229.png\" \/>\n<meta name=\"twitter:card\" content=\"summary\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\">\n\t<meta name=\"twitter:data1\" content=\"Nick Connor\">\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture est.\">\n\t<meta name=\"twitter:data2\" content=\"1 minute\">\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.thermal-engineering.org\/fr\/#website\",\"url\":\"https:\/\/www.thermal-engineering.org\/fr\/\",\"name\":\"Thermal Engineering\",\"description\":\"\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":\"https:\/\/www.thermal-engineering.org\/fr\/?s={search_term_string}\",\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"fr-FR\"},{\"@type\":\"ImageObject\",\"@id\":\"https:\/\/www.thermal-engineering.org\/fr\/quel-est-le-nombre-de-cavitation-definition\/#primaryimage\",\"inLanguage\":\"fr-FR\",\"url\":\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/cavitation-damaged-impeller-min-300x229.png\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.thermal-engineering.org\/fr\/quel-est-le-nombre-de-cavitation-definition\/#webpage\",\"url\":\"https:\/\/www.thermal-engineering.org\/fr\/quel-est-le-nombre-de-cavitation-definition\/\",\"name\":\"Quel est le nombre de cavitation - D\\u00e9finition\",\"isPartOf\":{\"@id\":\"https:\/\/www.thermal-engineering.org\/fr\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.thermal-engineering.org\/fr\/quel-est-le-nombre-de-cavitation-definition\/#primaryimage\"},\"datePublished\":\"2019-10-22T14:22:57+00:00\",\"dateModified\":\"2019-10-22T14:22:57+00:00\",\"author\":{\"@id\":\"https:\/\/www.thermal-engineering.org\/fr\/#\/schema\/person\/e8c544db9afedaec8574d6464f9398bb\"},\"description\":\"Le nombre de cavitation ou param\\u00e8tre de cavitation est un nombre sans dimension. Il caract\\u00e9rise le fait que la pression dans le liquide est proche de la pression de vapeur. G\\u00e9nie thermique\",\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.thermal-engineering.org\/fr\/quel-est-le-nombre-de-cavitation-definition\/\"]}]},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.thermal-engineering.org\/fr\/#\/schema\/person\/e8c544db9afedaec8574d6464f9398bb\",\"name\":\"Nick Connor\",\"image\":{\"@type\":\"ImageObject\",\"@id\":\"https:\/\/www.thermal-engineering.org\/fr\/#personlogo\",\"inLanguage\":\"fr-FR\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/84c0dec310b44b65da29dc9df6925239?s=96&d=mm&r=g\",\"caption\":\"Nick Connor\"}}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","_links":{"self":[{"href":"https:\/\/www.thermal-engineering.org\/fr\/wp-json\/wp\/v2\/posts\/46530"}],"collection":[{"href":"https:\/\/www.thermal-engineering.org\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.thermal-engineering.org\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.thermal-engineering.org\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.thermal-engineering.org\/fr\/wp-json\/wp\/v2\/comments?post=46530"}],"version-history":[{"count":0,"href":"https:\/\/www.thermal-engineering.org\/fr\/wp-json\/wp\/v2\/posts\/46530\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.thermal-engineering.org\/fr\/wp-json\/wp\/v2\/media?parent=46530"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.thermal-engineering.org\/fr\/wp-json\/wp\/v2\/categories?post=46530"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.thermal-engineering.org\/fr\/wp-json\/wp\/v2\/tags?post=46530"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}