This work deals with the numerical simulation of aeroacoustic sound generated by flexible structures in low Mach number turbulent flows. A partitioned computation scheme is investigated to solve the coupled fluid-solid problem. A hybrid method based on the acoustic/viscous splitting technique is applied for aeroacoustic computation using large eddy simulations (LES) to resolve the incompressible turbulent flow field. Combining the acoustic/viscous splitting approach with a Kirchhoff wave extrapolation method enables an efficient evaluation of the far-field noise. The arbitrary Lagrangian-Eulerian (ALE) technique is applied for both the incompressible flow field and the acoustic field to take moving boundaries into account. Validation of the acoustic computation process is presented for stationary and moving surfaces. Finally, the approach described in this work is applied to study the aeroacoustic characteristics of a membrane airfoil.

这项工作涉及在低马赫数湍流中由柔性结构产生的气动声学声音的数值模拟。研究了一种分区计算方案来解决耦合流固问题。基于声学/粘性分裂技术的混合方法应用于气动声学计算，使用大涡模拟 (LES) 来解析不可压缩湍流流场。将声学/粘性分裂方法与基尔霍夫波外推法相结合，可以有效地评估远场噪声。任意拉格朗日-欧拉 (ALE) 技术适用于不可压缩流场和声场，以考虑移动边界。对静止和移动表面的声学计算过程进行了验证。最后，