Beamforming Investigation of Dominant Counter-Rotating Open Rotor Tonaln and Broadband Noise Sources

摘要

Phased array microphone measurements and beamforming technology have been applied in the investigation of counter-rotating open rotors in an attempt to better understand their noise sources. It has already been presented in the literature that the beamforming results of rotating coherent noise sources, typical tonal noise sources for counter-rotating open rotors, will be localized to their respective Mach radii rather than their true noise source locations. Building on these results, the present