Control of Surge in Centrifugal Compressor by Using a Nozzle Injection System: Universality in Optimal Position of Injection Nozzle

Figure 9

Spectrum of pressure fluctuation at delivery duct for Type B.

(a) 50,000 rpm (𝑄≒0.011kg/s)

(b) 60,000 rpm (𝑄≒0.011kg/s)