The influence of corrugation depth on aerodynamic noise characteristics of corrugated pipes

Based on the method of LES (large eddy simulation) and FWH (Ffowcs Williams-Hawkings), the aerodynamic noise of corrugated tubes in 3D model was simulated and calculated, which was consistent with the theoretical value and experimental value. Comparing the results of parametric calculation and analysis of corrugated depth, the research results show that: ① when the air flowing through corrugated tubes, the maximum of the absolute pressure appears at the corrugated pitch point and the minimum appears at the corrugated ventral point. ② The average of surface sound pressure of aerodynamic noise increases as the axial distance increasing. ③ The sound pressure level and the mean power spectral density first increase and then decrease as the corrugated depth increasing. The numerical calculation method in this paper has potential application value in the field of duct noise processing.