滤波器湍流模型在低温流体空化流动数值计算中的应用

doi:10.3969/j.issn.1000-1093.2012.04.012

兵工学报 ›› 2012, Vol. 33 ›› Issue (4): 451-458.doi: 10.3969/j.issn.1000-1093.2012.04.012

滤波器湍流模型在低温流体空化流动数值计算中的应用

时素果¹，王国玉¹，权晓波²，赵宇¹

（1.北京理工大学机械与车辆学院, 北京 100081； 2.北京宇航系统工程研究所, 北京 100076)

收稿日期:2011-07-07 修回日期:2011-07-07 上线日期:2014-03-04
作者简介:时素果（1982—），女，博士研究生
基金资助:
国家自然科学基金项目(50979004)；高校博士点基金项目(200800070027)

Evaluation of Filter-based Model for Numerical Computation of Cryogenic Turbulent Cavitating Flows

SHI Su-guo¹, WANG Guo-yu¹, QUAN Xiao-bo², ZHAO Yu¹

(1. School of Mechanical and Vehicular, Beijing Institute of Technology, Beijing 100081, China;2. Beijing Institute of Astronautical System Engineering, Beijng 100076, China)

Received:2011-07-07 Revised:2011-07-07 Online:2014-03-04

摘要/Abstract

摘要： 评价了滤波器湍流模型在低温流体空化流动计算中的应用。分别采用标准k－ε、修正RNG k－ε和FBM湍流模型对绕对称回转体在液氮中的空化流动进行模拟，并计算了进口湍流度对空化流动的影响。与实验结果对比表明：相对标准k－ε和修正RNG k－ε湍流模型的计算结果，FBM湍流模型可以更好地反映低温流体中汽液混合的空泡界面，更准确捕捉由于热力学效应影响而造成的压力和温度变化，计算得到的结果与实验数据更为接近。标准k－ε和修正RNG k－ε模型对计算工况的进口μ_T/μ_L|_inlet粘性比比较敏感。采用FBM湍流模型计算，可以明显减小进口μ_T/μ_L|_inlet粘性比对计算结果的影响。

关键词: 流体力学, 低温流体, 空化, 湍流模型, 湍流度

Abstract: The application of filter-based turbulent model in the computation of the cryogenic turbulent cavitating flows was evaluated. The standard k－ε, modified RNG k－ε and FBM turbulence models were used to simulate the cavitating flows around an axisymmetric ogive in liquid nitrogen and investigate the influence of the inlet turbulent intensity on the cavitating flows. By comparing the numerical results with the experimental data in a reference, it is shown that the FBM turbulence model can be used to simulate the cavity interface of the vapour-liquid mixture in the cryogenic fluids so much the better, and capture the pressure and temperature distributions around the axisymmetric ogive more accurately. The simulation results obtained by the FBM model are accordant with the experimental data. The standard k－ε and modified RNG k－ε models are more sensitive to the inlet eddy-to-laminar viscosity ratio of the calculation cases. The FBM model can be used obviously to reduce the effect of the inlet boundary conditions of μ_T/μ_L|_inlet viscosity ratio on the numerical results.

Key words: fluid mechanics, cryogenic fluids, cavitating flows, turbulent model, turbulent intensity

中图分类号:

O359.1

时素果，王国玉，权晓波，赵宇. 滤波器湍流模型在低温流体空化流动数值计算中的应用[J]. 兵工学报, 2012, 33(4): 451-458.

SHI Su-guo, WANG Guo-yu, QUAN Xiao-bo, ZHAO Yu. Evaluation of Filter-based Model for Numerical Computation of Cryogenic Turbulent Cavitating Flows[J]. Acta Armamentarii, 2012, 33(4): 451-458.

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滤波器湍流模型在低温流体空化流动数值计算中的应用

Evaluation of Filter-based Model for Numerical Computation of Cryogenic Turbulent Cavitating Flows

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