Numerical Investigation of an Unsteady Blade Surface Blowing Method to Reduce Rotor Blade-Vortex Interaction Noise

Figure 14

Acoustic pressure time history at all microphones for the steady/unsteady blowing cases.

(a) Microphone 1

(b) Microphone 2

(c) Microphone 3

(d) Microphone 6

(e) Microphone 7

(f) Microphone 8

(g) Microphone 9