03.2 - Experimental Aerodynamics
CHALLENGES OF AERO-ACOUSTIC MEASUREMENTS IN WIND TUNNEL: IDENTIFICATION AND ELIMINATION OF "PARASITE" NOISE
Y. Sun¹, C. Breard¹, X. Li¹, Y. Chen¹; ¹Shanghai Aircraft Design and Research Institute of COMAC, China
Challenges in identifying and eliminating parasite noise is reported during aero-acoustic test measurements of scaled aircraft. Expectations of noise measurements are to observe broadband noise. However, several parasite noises are observed, which could correspond to real noise or to artifact from scaled model, lack of fidelity, manufacturing tolerance, simplification and/or wind tunnel set-up.