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

Figure 18

First system mode (359.1 Hz) forced response for interblade phase angles of 0, 60, 120, 180, 240, 300, and 360° of the tip-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