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Développement d'un modèle de cavitation à poche sur hydrofoils et hélices en régimes transitoires, implémentation sur codes potentiels et validation expérimentale

Abstract : A partial sheet cavitation model has been developed and implemented in a steady two-dimensional potential flow code and in an unsteady three-dimensional potential flow code. This cavitation model uses the transpiration velocity technique to simulate the presence of the sheet cavitation. Neither an additional cavity closure model nor empirical parameters are required. Adaptable to every flow solver, the model allows a reasonably rapid simulation both in steady- and unsteady-state flow conditions for a hydrofoil or a propeller. The model is validated by comparing its results with experimental data in steady-state flow condition of a two-dimensional hydrofoil. The numerical results agree very well with the observed cavity lengths and the measured pressure distribution. As for the three-dimensional flow case, the available data in the literature allowed only the qualitative validation on the cavity length. A series of experiments in cooperation with the Bulgarian Ship Hydrodynamic Centre (BSHC) to measure the lift and drag of a hydrofoil has been then conducted for the quantitative validation of the cavitation model. The comparison results show good agreement between the experimental measurements and the numerical simulations. Finally, the cavitating propellers simulations in unsteady-state flow condition are also presented. It is shown that the partial sheet cavitation has little effect on the propeller hydrodynamic performances.
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https://tel.archives-ouvertes.fr/tel-00565262
Contributor : Surasak Phoemsapthawee <>
Submitted on : Friday, February 11, 2011 - 2:49:02 PM
Last modification on : Wednesday, October 14, 2020 - 3:52:10 AM
Long-term archiving on: : Thursday, May 12, 2011 - 2:43:43 AM

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  • HAL Id : tel-00565262, version 1

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Surasak Phoemsapthawee. Développement d'un modèle de cavitation à poche sur hydrofoils et hélices en régimes transitoires, implémentation sur codes potentiels et validation expérimentale. Dynamique des Fluides [physics.flu-dyn]. Université de Bretagne occidentale - Brest, 2009. Français. ⟨tel-00565262⟩

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