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兵工学报  2012 

滤波器湍流模型在低温流体空化流动数值计算中的应用

, PP. 451-458

Keywords: 流体力学,低温流体,空化,湍流模型,湍流度

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Abstract:

?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RNGk-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RNGk-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RNGk-ε模型对计算工况的进口μT/μL|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μT/μL|inlet粘性比对计算结果的影响。

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