A Study on Fluid Self-Excited Flutter and Forced Response of Turbomachinery Rotor Blade

Figure 10

First system mode (255 Hz) forced response for interblade phase angles of 0, 60, 120, 180, 240, 300, and 360° of the midspan shrouded blade.

(a) GA = 0 degree

(b) GA = 60 degree

(c) GA = 120 degree

(d) GA = 180 degree

(e) GA = 240 degree

(f) GA = 300 degree

(g) GA = 360 degree