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空腔流动中包含多种复杂的物理现象,一直是流体力学中的一个重要问题。本文研究了三维非定常雷诺平均N-S方程和分离涡模拟(Detached eddy simulation,DES)方法在空腔流动及空腔噪音问题的应用。利用两种方法对三维空腔流动及噪音进行了数值计算并与实验数据进行了对比,通过分析比较发现DES方法得到的结果更加准确,特别是通过声压级(Sound pressure level,SPL)分析发现DES方法能够较好地捕捉空腔流动中的压强脉动及噪声水平,说明DES方法能够有效处理空腔流动问题。
Cavity flow contains a variety of complex physical phenomena, has been an important issue in fluid mechanics. In this paper, the applications of three-dimensional unsteady Reynolds averaged N-S equation and Detached eddy simulation (DES) method in cavity flow and cavity noise are studied. Two methods were used to calculate the 3D cavity flow and noise numerically and compared with the experimental data. The results obtained by the DES method are more accurate by comparison and analysis, especially through the sound pressure level (SPL) analysis DES method can better capture the pressure pulsation and noise level in the cavity flow, indicating that the DES method can effectively deal with the cavity flow problem.