Modeling for commercial aircraft environment control system ramp noise

Thanks to low noise requirements on commercial transportation aircraft and numerical simulation which helps acoustic engineers more deeply understand noise source and propagation mechanism, OEM invests more money on commercial software and acoustic research projects. This paper describes a joint research project on noise of aircraft Environment Control System (ECS), invested by Shanghai Aircraft Design and Research Institute (SADRI) of Commercial Aircraft Corporation of China (COMAC). In this paper, ECS noise propagation mechanism is studied which can explain how the noise is propagated from the source to the receiver. Based on the research results, the possibility of numerical modelling application on ECS ramp noise is discussed, and a fast engineering method is proposed for predicting aircraft ECS noise and risk control.