Abstract
Sefl-excited sound caused by flow is discussed specifically categorizing it into four groups : (1) Self-excited sound due to interaction between shear layer (s) and solid surface (s), which includes edge tone, hole tone, pipe tone, cavity tone, etc., (2) self-excited sound due to Karman vortex shedding, (3) self-excited sound due to swirling flow such as vortex whistle, and (4) self-excited sound due to supersonic jets such as screech. The common features are the existence of shear layer (s) in the flow field and the occurrence of feed back pressure signals to sustain the self-excited oscillation of the system. The nonlinear features of the phenomena such as sound generation mechanism, mode selection scheme and alteration of time-averaged flow field due to sound generation are also illustrated.
