Implicit large eddy simulation of unsteady cloud cavitation around a plane-convex hydrofoil

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• 作者：Victor HIDALGO^a ; ^{victor.hidalgo@epn.edu.ec" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Xian-wu LUO ((罗先武))^a ; ^{luoxw@mail.tsinghua.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Xavier ESCALER^b ; Bin JI ((季斌))^c ; Alvaro AGUINAGA^d
• 关键词：implicit large eddy simulation (ILES) ; unsteady partial cavitation ; Zwart-Gerber-Belamri cavitation model ; OpenFOAM ; Q-criterion
• 刊名：Journal of Hydrodynamics, Ser. B
• 出版年：2015
• 出版时间：December 2015
• 年：2015
• 卷：27
• 期：6
• 页码：815-823
• 全文大小：1919 K

文摘

The present paper focuses on the erosive cavitation behavior around a plane convex hydrofoil. The Zwart-Gerber-Belamri cavitation model is implemented in a library form to be used with the OpenFOAM. The implicit large eddy simulation (ILES) is applied to analyze the three dimensional unsteady cavitating flow around a plane convex hydrofoil. The numerical results in the cases under the hydrodynamic-conditions, which were experimentally tested at the high speed cavitation tunnel of the École Polytechnique Fédérale de Lausanne (EPFL), clearly show the sheet cavitation development, the shedding and the collapse of vapor clouds. It is noted that the cavitation evolutions including the maximum vapor length, the detachment and the oscillation frequency, are captured fairly well. Furthermore, the pressure pulses due to the cavitation development as well as the complex vortex structures are reasonably well predicted. Consequently, it may be concluded that the present numerical method can be used to investigate the unsteady cavitation around hydrofoils with a satisfactory accuracy.