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Étude numérique et expérimentale des écoulements cavitants sur corps portants

Abstract : This work lies within the scope of applied research which take place at the Laboratory of Mechanics of Lille and the Research institute of the Naval Academy in the respective field of the turbomachine and the marine propellers and appendices equipping the ships (stabilizing, saffrons...). The main aim of the thesis is to study instabilities of cavitation. For that, numerical simulations associating with the already existing models of cavitation are made and a comparison of these models is carried out. We are interested particularly in the homogeneous models of cavitation for which the liquid mixture/vapor is regarded as a single fluid with variable density. The mass transfer between the two phases is controlled either by a barotropic state law which connects the density to the pressure or by a void fraction transport equation with suitable sources terms. In parallel, experimental measurements based to the measure of parietal pressure and video acquisitions are carried out in the tunnel of cavitation of the Naval Academy. This experimental study is completed by the study undertaken by O. Coutier in the ENSTA academy in Paris and which allowed obtaining the profiles of instantaneous void fraction by X-ray measurements. The experimental and numerical results are analyzed by original techniques of signal treatment.
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https://pastel.archives-ouvertes.fr/pastel-00544746
Contributor : Sobhi Frikha <>
Submitted on : Wednesday, December 8, 2010 - 7:20:58 PM
Last modification on : Friday, July 17, 2020 - 2:53:33 PM
Long-term archiving on: : Thursday, March 10, 2011 - 12:58:44 PM

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  • HAL Id : pastel-00544746, version 1

Citation

Sobhi Frikha. Étude numérique et expérimentale des écoulements cavitants sur corps portants. Mécanique des fluides [physics.class-ph]. Arts et Métiers ParisTech, 2010. Français. ⟨pastel-00544746⟩

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