民用飞机反推力格栅出流模式设计与试验

摘要

By defining the deflection angles of exhaust flow on each cascades, efflux-pattern describes the cir-cumferential distribution of the exhaust flow from the thrust reverser around a nacelle. The determination of the ef-flux pattern must take into account the requirements for efficiency, re-ingestion characteristics and effective area, as well as the impact imposed by the exhaust flow on the aircraft aerodynamic characteristics. Whether or not cer-tain efflux design provides sufficient thrust efficiency and effective area can be evaluated by separate thrust reverser static test while re-ingestion characteristics and engine/aircraft aerodynamic interference can only be studied in an installed wind tunnel test.%通过给定各块格栅上气流的折流角,反推力格栅出流模式描述了反推气流方向沿发房周向的分布. 出流模式的定义需要考虑使反推系统满足反推效率,重吸入特性和有效面积方面的要求,还应使反推气流对机体气动特性的影响最小化. 格栅出流模式设计是否满足反推效率和有效面积的要求,可由单独反推系统的静态试验来进行验证,而重吸入特性和发动机/飞机气动干扰则必须通过全机反推力风洞试验来进行考察.