{"id":1321,"date":"2018-06-20T08:13:42","date_gmt":"2018-06-20T06:13:42","guid":{"rendered":"http:\/\/sibam89.fr\/?p=1321"},"modified":"2018-06-20T13:41:03","modified_gmt":"2018-06-20T11:41:03","slug":"leffet-venturi","status":"publish","type":"post","link":"https:\/\/sibam89.fr\/?p=1321","title":{"rendered":"L’effet Venturi"},"content":{"rendered":"

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 L’effet Venturi<\/strong><\/span>, du nom du physicien italien Giovanni Battista Venturi<\/a><\/span>, est le nom donn\u00e9 \u00e0 un ph\u00e9nom\u00e8ne de la dynamique des fluides o\u00f9 il y a formation d’une d\u00e9pression<\/strong><\/span> dans une zone o\u00f9 les particules de fluides sont acc\u00e9l\u00e9r\u00e9es<\/span><\/strong>. Le th\u00e9or\u00e8me de Bernoulli<\/a> permet de comprendre ce ph\u00e9nom\u00e8ne\u00a0: si le d\u00e9bit de fluide est constant et que le diam\u00e8tre de la section de passage diminue, la vitesse augmente n\u00e9cessairement\u00a0; du fait de la conservation de l’\u00e9nergie, l’augmentation d’\u00e9nergie cin\u00e9tique<\/a> se traduit par une diminution d’\u00e9nergie \u00e9lastique<\/a>, c’est-\u00e0-dire une d\u00e9pression<\/span><\/strong>. <\/span>A d\u00e9bit constant<\/span>, si la section de passage r\u00e9duit, alors la vitesse de passage augmente.<\/span><\/strong><\/span><\/p>\n

\"\"<\/span><\/strong><\/span><\/p>\n

Sch\u00e9matisation de l’effet Venturi :<\/span><\/p>\n

La pression<\/a> au point 1 est plus grande qu’au point 2.<\/span><\/p>\n

Et la vitesse du fluide au point 2 est plus grande qu’au point 1.<\/span><\/p>\n

 <\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 L’effet Venturi peut \u00eatre utilis\u00e9 pour cr\u00e9er une d\u00e9pression<\/a> et ainsi r\u00e9aliser une <\/span>aspiration<\/span><\/a>. L’utilisation des flux rapides peut se faire \u00e0 l’int\u00e9rieur des conduits et en particulier l’effet venturi permet la cr\u00e9ation d’\u00e9jecteurs capables de grandes puissances d’aspiration par induction en utilisant directement de l’air comprim\u00e9.<\/span><\/p>\n

\"\"<\/p>\n

 <\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Cette propri\u00e9t\u00e9 physique est utilis\u00e9e par exemple d<\/span>ans la conception d’as<\/strong><\/span><\/span>pirateurs \u00e0 air comprim\u00e9 <\/strong><\/span>particuli\u00e8rement adapt\u00e9s \u00e0 l’aspiration de mati\u00e8res agressives m\u00e9caniquement ou chimiquement (cassons de verre, copeaux, vapeurs toxiques …).
\n<\/span><\/p>\n

 <\/p>\n

\"\"<\/p>\n

 <\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 L’effet Venturi, du nom du physicien italien Giovanni Battista Venturi, est le nom donn\u00e9 \u00e0 un ph\u00e9nom\u00e8ne de la dynamique des fluides o\u00f9 il y a formation d’une d\u00e9pression dans une zone o\u00f9 les particules de fluides sont acc\u00e9l\u00e9r\u00e9es. Le th\u00e9or\u00e8me de Bernoulli permet de comprendre ce ph\u00e9nom\u00e8ne\u00a0: si le d\u00e9bit de fluide est […]<\/p>\n","protected":false},"author":1,"featured_media":1338,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"class_list":["post-1321","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-theorie-appliquee"],"_links":{"self":[{"href":"https:\/\/sibam89.fr\/index.php?rest_route=\/wp\/v2\/posts\/1321","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sibam89.fr\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sibam89.fr\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sibam89.fr\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sibam89.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1321"}],"version-history":[{"count":26,"href":"https:\/\/sibam89.fr\/index.php?rest_route=\/wp\/v2\/posts\/1321\/revisions"}],"predecessor-version":[{"id":1324,"href":"https:\/\/sibam89.fr\/index.php?rest_route=\/wp\/v2\/posts\/1321\/revisions\/1324"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sibam89.fr\/index.php?rest_route=\/wp\/v2\/media\/1338"}],"wp:attachment":[{"href":"https:\/\/sibam89.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1321"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sibam89.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1321"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sibam89.fr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1321"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}