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

机译:零零压力梯度湍流边界层壁压波动的数值研究

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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:使用快速随机粒子网法产生的合成湍流模拟平板配置上的湍流边界层。随机实现所需的平均湍流统计由雷诺平均纳维尔 - Stokes计算提供。通过计算泊松方程来获得壁压波动,包括​​平均剪切湍流相互作用项和湍流湍流相互作用项。通过Hockney的方法解决了泊松方程。计算零和不利压力梯度边界层的壁压波动。通过将翼型放置在平板上方的翼型来实现不利的压力梯度。分析了模拟的单点光谱和两点统计。将结果与实验结果进行比较,其在声缠绕的挡风机Braunschweig中测量相同的配置。获得了与实验结果的良好一致性。

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