Numerical Study on Flow-Induced Noise of Deflector Jet Servo Valve Based on LES/Lighthill Hybrid Method

Figure 19

Oscillation characteristics of the prestage. (a) 0∼30 s frequency domain. (b) 0∼10 s frequency domain. (c) 10∼20 s frequency domain. (d) 20∼30 s frequency domain.

(a)

(b)

(c)

(d)