To provide a verification platform for various active surge controllers

a new rotating stall and surge model for axial compressor was proposed.Based on Moore-Greitzer post stall transient model

influences of spool dynamics and higher harmonics of rotating stall waves were considered in the proposed new model.In addition

a closed-coupled valve was included in the model as an actuator.Several conclusions can be made from simulation results.Firstly

with the increasing of rotor speed

the instability behavior of compressor transforms from rotating stall to surge.Secondly

as an internal disturbance

the spool dynamic may lead to instability even under large throttle opening conditions.Finally

even the initial disturbance only includes the first harmonics

the higher harmonics may become strong and have a significant effect on the behavior of rotating stall.