Research On Inlet Distortion's Effect On Aero-engine Using Parallel Compressor Model

To the Aeroengine,the compressor is the most sensitive component to the inlet airflow. The total temperature and the total pressure distortion of inlet flow field can cause the compressor and the aeroengine to lose stability when the fighter is flying or launching missiles,so it is very important to study the effects of inlet distortion on the low pressure compressor and the turbofan engine. For the given aeroengine which has satisfactory performance in the test,but not enough net thrust in the trial flight,this paper based on the program Q440 and the parallel compressor model,compiles a calculation program and conducts the numerical simulation of the performance of the compressor and turbofan engine. The results show that the inlet distortion makes compressor's surge line move to the bottom right. Meanwhile, it cause that the compression ratio reduce,the engine's net thrust decreases,and the specific fuel consumption increases.