Numerical modeling on installed performance of turbofan engine with inlet ejector

Abstract

Abstract In order to consider the capacity of aircraft infrared stealth, a turbofan engine with inlet ejector nozzle is derived for flight mission analysis. The turbofan engine is equipped with an auxiliary inlet door that utilizes the inlet bypass flow to ejector the nozzle and increase the engine installed thrust. Firstly, on the basis of the quasi one-dimensional flow theory, the ejector nozzle model is established to analyze its performance effect on the engine. Secondly, a backward infrared radiation intensity prediction method for exhaust system is proposed. Finally, during the analysis of engine installed performance, the supersonic inlet drag is considered. The numerical simulations results indicated that, compared with the conventional turbofan engine, the turbofan engine with inlet ejector not only reduces the infrared radiation and specific fuel consumption, but also increases the engine installed thrust, which improves the engine performance significantly.