Research on Test Techniques for Far-field Noise of Aircraft Engine Fan
The high-bypass-ratio fan noise is recognized as one of the primary noise sources of aircraft engine,fan acous-tic test techniques have emerged as a crucial tool within the realm of aircraft engine noise control.Firstly,the fan noise gen-eration mechanism is briefly described.Then the development status of fan far-field noise test techniques is reviewed,and the domestic and international fan acoustic test methods and test equipment employed in fan acoustic experiments are comprehen-sively analyzed.It shows that there are three principal schemes for far-field fan noise testing,among which the test proposal based on acoustic test facilities and on acoustic wind tunnel are mature in technology and have high accuracy.while the scheme based on outdoor open-air environments has relatively lower testing accuracy and is considered as an alternative.Fi-nally,a brief summary and outlook on far-field fan noise testing methods are provided.
万方数据
维普
