摘要
反推短舱全环格栅的气动设计是涡扇发动机反推系统的关键,决定了反推系统使用中与发动机的匹配性以及为飞机提供的反推力.本文详细介绍了缩比涡扇发动机反推短舱全环格栅静态试验技术,包括试验相似参数模拟、试验原理、试验关键技术和数据处理过程等.试验结果表明,试验系统的有效面积比均方根误差0.0013,反推效率均方根误差0.0014,压力系数测量均方根误差0.0033,反推短舱入口总压最大不均匀性小于1.54%.典型状态数值计算与试验结果一致性较高,试验技术可精确评估缩比涡扇发动机反推全环格栅气动特性.
The aerodynamic design of cascade is critical to the thrust reverse system of turbofan engine,which determines the thrust-reverse system's compatibility with engine and provides reversed thrust to the aircraft.The testing technique for scaled cascade thrust reverser of a typical high bypass ratio turbofan engine is introduced in this paper,including similarity parameters,testing principles,key techniques and data reduction procedures.The testing results indicate that the repeatability of discharge rate is 0.0013;the the repeatability of overall thrust reverser effectiveness is 0.0014;the pressure coefficient repeatability is 0.0033;the total pressure non-uniformity at the model inlet is below 1.54%.The experimental results of typical configurations are in good agreement with the CFD results,which indicates that the testing technique could evaluate the cascade thrust reverser performance effectively.
作者
季军
李鹏
刘帅
宋孝宇
杨硕
张厚博
Ji Jun;Li Peng;Liu Shuai;Song Xiaoyu;Yang Shuo;Zhang Houbo(AVIC Aerodynamics Research Institute,Shenyang 110034,China;Key Lab for High Speed and High Reynolds Number Aerodynamic Reserch,Shenyang 110034,China)
出处
《气动研究与试验》
2023年第2期127-134,共8页
Aerodynamic Research & Experiment
关键词
反推短舱
全环格栅
有效面积比
反推效率
thrust reverser
cascade
overall thrust reverser ffectiveness
discharge rate
