EXPERIMENTAL STUDY ON ENGINE PERFORMANCE AND INTERNAL FLOW FIELD UNDER INLET DISTORTION

A turbojet engine has been tested under the conditions of a series of screen-induced inflow distortion.Its compressor interstage flow field (static pressure,total pressure and total temperature),inlet distortion transmission,temperature field at turbine outlet and bed-tested engine performance were measured.The measurements indicate that:the inlet total and static pressure distortions are attenuated through the stages,the inlet total pressure distortion induces total temperature distortion at the compressor outlet,the inlet pressure distortion reduces the engine thrust and increases its specific fuel consumption.The tested data reveal also that there exists probably a correlation between temperature distributions at turbine outlet and compressor outlet.