The post-stall behaviors

such as surge and rotating stall

of a three-st age compressor are simulat ed based on an one-dimensional unsteady model for the dynamic response of compression system.The variations of the annular average parameters

i.e.velocity

pressure

temperature and flow coefficient

can be obtained from the simulation. The stall types can be identified by these parameters vs.time.In addition

the effect of parameter"B"

proposed by E.M.Greitzer

is analyzed.