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

该项目将首先解决现有的差距，在航空声学模型的表面粗糙度的影响，多孔材料的边界层湍流。这应通过在布伦瑞克（AWB）声学风洞中进行模型比例风洞试验来完成和验证。梯度孔隙度的成功概念将首次在Coanda皮瓣上实施。基于高雷诺数下主动增升系统完整的功能性空气动力学和良好的仿真环境，将进行优化的静音设计。与TP A5和TP B5合作，将研究航空/声学要求与材料微结构之间的联系。应在DNW-NWB（TP Z2）的大规模实验中对数值方法进行验证。

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).