Hi, how stall and surge occur in cold air unit.? why it occurs?, what are the factors effects the stall in compressor? how it will reduce mass flow rate? please give proper explanation for compressor stall
Thank you
You're going to have to spend a few hours of learning on this to understand all the contributors in a multistage multispool compressor system. Way beyond internet postings
Basically it has to do with angle of incidence on the airfoils (changing with speeds and air flows) and, turbulent flow (airfoil damage or clearance).
How and where these get into the act is what takes the time to learn the answers to your question. Any stall means some stages are not working fully, hence mass flow rate falls off.
The surge part of it is when the engine simply gives up breathing in a full stage stall for a second and tries to catch its breath.