基于URANS与DDES方法的空腔近场噪声数值研究

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振动与冲击 ›› 2016, Vol. 35 ›› Issue (20) : 154-159.

论文

刘俊1，杨党国2，王显圣2，罗新福2

作者信息 +

NUMERICAL SIMULATION OF NEAR-FIELD CAVITY NOISE BY URANS AND DDES

LIU Jun1, YANG Dang-guo2, WANG Xian-sheng2, LUO Xin-fu2

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文章历史 +

摘要

采用基于SST(Shear-Stress Transport)湍流模式的URANS(Unsteady Reynolds-averaged Navier-Stokes)和DDES (Delayed Detached Eddy Simulation)方法开展了马赫数0.85的三维空腔非定常流动数值计算。计算结果表明：两种方法得到的空腔底部静压、脉动压力声压级和功率谱均与实验及参考文献结果具有良好的一致性；DDES在模拟流动失稳、小尺度结构等流动细节方面更具优势，对高频压力脉动的捕捉也要优于URANS。通过对时均流场的分析，确定了模拟的空腔流动类型为过渡式流动，同时发现空腔内存在的复杂三维涡结构，并分析了这些涡结构对空腔流场特性的影响。

Abstract

Numerical simulations of three-dimensional unsteady cavity flow at Mach number 0.85 were conducted by using delayed detached eddy simulation (DDES) and unsteady RANS (URANS) methods based on the SST turbulence model. The gained static pressure, sound pressure level (SPL) and power spectral of pressure fluctuations at the cavity bottom by both methods compared well with experimental and other CFD results. Compared with URANS, DDES is more suitable for modeling flow details such as shear layer instability and fine scale turbulence structures, and also for high frequency pressure fluctuation capture. The simulated cavity flow can be identified as transitional flow by checking the time averaged flow characteristics. Meanwhile, complicated three-dimensional flow structures are also captured by both DDES and URANS, the effects of which are discussed.

导出引用

刘俊1，杨党国2，王显圣2，罗新福2. 基于URANS与DDES方法的空腔近场噪声数值研究[J]. 振动与冲击, 2016, 35(20): 154-159

LIU Jun1, YANG Dang-guo2, WANG Xian-sheng2, LUO Xin-fu2. NUMERICAL SIMULATION OF NEAR-FIELD CAVITY NOISE BY URANS AND DDES[J]. Journal of Vibration and Shock, 2016, 35(20): 154-159

参考文献

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