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

Figure 8

Spectrum of pressure fluctuation at delivery duct.

(a) 50,000 rpm (𝑄≒0.010kg/s)

(b) 60,000 rpm (𝑄≒0.014kg/s)