Sorry for answering that late. First of all I would like to thank you for your replies.You pushed me into the rhight direction. I don't know much about oscillations. Now I know where to start reading.. (harmonics, standing wave, linear and non linear oscillations)
Thank you guys!
OK. Maybe you're right and my text was a bit weird.
I understand why there is surge at 7.3Hz. This is caused by the resonance frequency of the system between compressor and engine.
It can be calculated with Helmholzresonator formula.
But as the simulation results show in the figure there are...
I'm writing my diploma thesis about some investigations on compressor surge. I was looking for an explanation of special surge detail regarding the surge frequency. In my experiments I always have the surge frequency of 20Hz multiple times (40Hz, 60 Hz) with weaker amplitude.
Today I finally...
