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基于密度分域的混合湍流模型的应用与评价

Keywords: 混合密度,空化流动,湍流黏性

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Abstract:

结合数值计算和实验结果评价了一种基于密度分域的混合湍流模型.实验采用高速录像和LDV测量技术观察了绕Clark-y型水翼云状空化随时间的流场结构变化和速度分布.数值模拟中,基于非定常空化的流动现象,建立了一种基于密度分域的混合湍流模型,并分别应用不同的湍流模型计算了绕水翼非定常云状空化流动.通过与实验结果的对比表明,分域湍流模型能够更好地调整流场内的湍流黏性,精确捕捉到空穴形态和空泡脱落的非定常细节,时均流场速度分布与实验值基本吻合.

References

[1]  Kawanami Y, Kato H. Mechanism and control of cloud cavitation[J]. Journal of Fluids Engineering, 1997,119(8):788 794.
[2]  Kunz R, Boger D, Stinebring D, et al. A preconditioned implicit method for two-phase flows with application to cavitation prediction[J]. Computer Fluids, 2000,29(8):849 875.
[3]  Singhal A K, Athavale M M. Mathematical basis and validation of the full cavitation model[J]. Journal of Fluids Engineering, 2002,124:617 624.
[4]  Kubota A, Kato H. Unsteady structure measurement of cloud cavitation on a foil section using conditional sampling techniques[J]. Journal of Fluids Engineering, 1989,111(3):204 210.
[5]  Moin P. Advances in large eddy simulation methodology for complex flows[J]. Int J Heat Fluid Flow, 2002,23:710 720.
[6]  Coutier-Delgosha O. Numerical prediction of cavitation flow on a two-dimensional symmetrical hydrofoil and comparison to experiments[J]. Journal of Fluids Engineering, 2007,129(3):279 291.
[7]  Wu J, Wang G Y, Shyy W. Time-dependent turbulent cavitating flow computations with interfacial transport and filter based models[J]. International Journal for Numerical Methods for Fluids, 2005,49:739 761.
[8]  张博,王国玉,张淑丽,等.修正的RNG k ε模型在云状空化流动计算中的应用评价[J].北京理工大学学报,2008,28(12):1065-1069. Zhang Bo, Wang Guoyu, Zhang Shuli, et al. Exaluation of a modified RNG k ε model for computations of cloud cavitating flows[J]. Transactions of Beijing Institute of Technology, 2008,28(12):1065-1069. (in Chinese)

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