进气畸变下涡喷发动机性能及内部流场的试验研究

本研究在涡喷发动机地面试车台上 ,利用畸变模拟网格在发动机进口建立所需的总压畸变流场 ,在均匀进气和畸变进气条件下 ,测量了压气机级间流场 (总压、静压、总温分布 )、畸变传递、涡轮后温度场和发动机台架性能。文中给出有代表性的试验结果。通过对试验结果的对比分析 ,得出若干有助于理解畸变影响机理和发展发动机性能及稳定性预测模型的结论。

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.