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arXiv 1808.04718physics.flu-dyn
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空化泡发生器对非定常云空化动力学的影响

Effect of Cavitating-bubble Generators on the Dynamics of Unsteady Cloud Cavitation

Ebrahim Kadivar, Khodayar Javadi

摘要:

本文采用一种称为空泡发生器(CGs)的被动空泡控制器方法,对CAV 2003基准翼型周围的非定常云空泡进行了三维数值研究。我们研究了这种被动控制器在水翼表面上对蒸发、气泡生成和气泡内爆的整个过程的影响。首先,本文采用部分平均纳维尔-斯托克斯(PANS)方法对无CG翼型的非定常空化流动进行了数值模拟。湍流方法与实现到开源有限体积包的传质模型相结合。然后,我们测试了不同尺寸和角度的CG在水翼表面。结果表明,适当的设计的CG的最大长度的附着空腔和水翼表面上的壁压脉动强度的大幅下降显着减少。

英文摘要:

The present paper is devoted to the 3D numerical study of unsteady cloud cavitation around the CAV2003 benchmark hydrofoil using a passive cavitation controller method called cavitation-bubble generator (CGs). We investigate this passive controller on the hydrofoil surface to affect the whole processes of vaporization, bubble generation and bubble implosion. Firstly we simulate the unsteady cavitating flow around the hydrofoil without CGs using a Partially- averaged Navier Stokes (PANS) method. The turbulence approach is coupled with a mass transfer model which implements to an open source finite-volume package. Then we tested different sizes and angles of CGs on the hydrofoil surface. The results of an appropriate design of the CGs shows a significant decrease of the maximum length of the attached cavity and a large decrease of wall-pressure fluctuation intensity on the hydrofoil surface.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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