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Numerical Study of Wall Pressure Fluctuations for Zero and Non-Zero Pressure Gradient Turbulent Boundary Layers

机译:零和非零压力梯度湍流边界层壁压力波动的数值研究

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Turbulent boundary layers on a flat plate configuration are simulated using synthetic turbulence generated by the Fast Random Particle-Mesh Method. The averaged turbulence statistics needed for the stochastic realization is provided by a Reynolds averaged Navier-Stokes calculation. Wall pressure fluctuations are obtained by calculating a Poisson equation including both the mean-shear turbulence interaction source term and the turbulence-turbulence interaction source term. The Poisson equation is solved by means of Hockney's method. Wall pressure fluctuations for zero and adverse pressure gradient boundary layers are calculated. The adverse pressure gradient is realized by placing an airfoil above the flat plate. Simulated one-point spectra and two-point statistics are analyzed. The results are compared to the experimental results, which were measured in the Acoustic Windtunnel Braunschweig for the same configurations. Good agreement with the experimental results is obtained.
机译:使用由快速随机粒子网格法生成的合成湍流来模拟平板结构上的湍流边界层。随机实现所需的平均湍流统计数据由雷诺平均Navier-Stokes计算提供。壁压力波动是通过计算包括平均剪切湍流相互作用源项和湍流-湍流相互作用源项的泊松方程获得的。泊松方程通过霍克尼方法求解。计算零和不利压力梯度边界层的壁压力波动。逆压力梯度是通过将翼型件放置在平板上方来实现的。分析了模拟的单点光谱和两点统计量。将结果与实验结果进行比较,实验结果是在不伦瑞克声学风洞中对相同配置进行测量的。与实验结果吻合良好。

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