The aim of this research is to develop a method to suppress the aerodynamic noise generated by a turbulent flow over a cavity. The results of an active control experiment and a passive control experiment are reported. In the active control experiment, the phases of velocity fluctuations along the spanwise direction are changed using piezo-electric actuators, so that the sound waves generated by these velocity fluctuations will eventually cancel each other in the far field. As a result of the active control, an aerodynamic noise suppression of 30 dB is achieved. In the passive control experiment, even a greater noise suppression effect, up to 65 dB is achieved. It is shown that the location and the size of the plate have a strong influence on the noise suppression for passive control.
Suppression of Aero-Acoustic Noise Over a Cavity
- Views Icon Views
- Share Icon Share
- Search Site
Kuroda, M, Izawa, S, Xiong, A, & Fukunishi, Y. "Suppression of Aero-Acoustic Noise Over a Cavity." Proceedings of the ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference. Volume 1: Fora, Parts A, B, C, and D. Honolulu, Hawaii, USA. July 6–10, 2003. pp. 977-982. ASME. https://doi.org/10.1115/FEDSM2003-45194
Download citation file: