Wind-Tunnel Investigation on the Compressive-Sensing Technique for Aeroengine Fan Noise Detection

摘要

In previous work, a new compressive-sensing-based method for ducted aeroengine fan noise tests was proposed. The current paper reports the details of the validated aeroengine fan noise test method and the wind-tunnel test results for the validation. The experimental setup consists of a uniform oncoming jet to simulate the oncoming flow experienced by the duct, a mode synthesizer to generate different modes of characteristic fan noise, and a sensor array to conduct mode detection in the presence of background flow with background noise interference. The main attention is primarily focused on the examination of the associated reconstruction accuracy and the probability of success for spinning mode detection with high background noise interference. The test results clearly show the potential capability of the proposed new fan mode detection method for aeroengine aeroacoustics tests in a practical testing facility.