关键词: 涡轮风扇发动机;防喘控制系统+;调节精度;数值仿真

Abstract: To simulate the engine performance in the course of getting anti-surge control system,a model for numerical simulation is presented.The model considers the volume effects of mixer,afterburner,combustor and outlet duct,fuel and the modulation of variable geometry chunnels.Based on this model,the working process in this transient regime is simulated and calculated according to getting anti-surge control system.The influence produced by the its modulation precision is studied.The comparision between the simulation results and the experimental findings indicates the model availability.The results show that the influence brought about by high pressure compressor variable guide vanes is more obvious than that produced by critical nozzle area,and that the effects brought about by high pressure compressor variable guide vanes modulation precision on high pressure rotor is serever than that of low pressure rotor,and this is just opposite to that of critical nozzle area modulation precision,and that every variable geometry chunnel has an optimal regulated value.The simulation model and method can lay an academic foundation on evaluating the efficiency of anti-surge control system.

Key words: Turbofan;Anti-surge control system+;Modulation precision;Numerical simulation