Simulation of airframe noise generation and reduction with porous materials for high lift systems (A01)

该项目将首先解决气动声学模型中关于多孔材料的表面粗糙度对边界层湍流的影响的现有空白。这应通过布伦斯韦格声学风洞(AWB)中的模型尺度风洞试验来完成和验证。分级孔隙度的成功概念将首次在科安达襟翼上实施。基于高雷诺数下主动高升力系统完整、实用的空气动力学和声学模拟环境，进行优化静音设计。将与TP A5和TP B5合作，研究气动/声学要求与材料微观结构之间的联系。数值方法的验证将在DNW-NWB(TP Z2)的大型试验中进行。

This project will first address the existing gaps in the aeroacoustic modelling regarding the surface roughness effects of porous materials on the boundary layer turbulence. This shall be accomplished and validat-ed by means of model scale wind tunnel tests in the Acoustic Windtunnel Braunschweig (AWB). The successful concept of graded porosity will be for the first time implemented on the Coanda flap. Based on the complete and functional aerodynamics and sound simulation environment of an active high-lift system at high Reynolds number, an optimized silent design will be carried out. In cooperation with TP A5 and TP B5 the link between aero-/acoustic requirements and the material micro structures will be investigated. Validation of the numerical methods shall be performed on the large scale experiment in DNW-NWB (TP Z2).