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Caractérisation des modes d’instabilités en aval d’une cavitéouverte de forme variable
Mourad Bouterra, Afif El Cafsi, Ali Belghith, François Lusseyran, Pierre Gougat
Journal:

Mechanics & Industry / Volume 10 / Issue 6 / November 2009

Published online by Cambridge University Press:

24 February 2010, pp. 429-436

Print publication:

November 2009
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Dans ce travail, on s’intéresse à l’étude et à la caractérisation expérimentale par latechnique vélocimétrie laser à effet Doppler, du phénomène de détachement tourbillonnairelors de l’interaction couche limite cavité. L’étude est effectuée en changeant la longueuret la hauteur de la cavité, ainsi que la vitesse de l’écoulement, afin de modifier lanature des structures présentes à l’intérieur de la cavité. La variation du nombre deStrouhal en fonction du nombre de Reynolds conduit à un regroupement pour chaque moded’instabilité, permettant de bien séparer les modes les uns des autres.