05 - Propulsion
IN-FLIGHT ACOUSTIC LOADS MEASUREMENTS ON AN ENGINE FLYING TEST BED
Y. Sun¹, C. Breard¹, X.P. Li¹, Y. Mei², P. Liu², M.B. Pang²; ¹Shanghai Aircraft Design and Research Institute of COMAC, China ;²COMAC Flight Test Center, China
Acoustic signatures of the new engine are investigated across different combinations of flight and operating conditions. Engine noise and turbulent boundary layer noise are separated using coherence techniques and compared with previous predictions models. Scaling methodologies at different altitudes and flight Mach number for engine and turbulent boundary layer noises are also reported.