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作为航空发动机主要部件之一的排气系统,其气动外形、重量及性能等对发动机乃至飞机的性能都有很大的影响。而大涵道比涡扇发动机分开式排气系统,涉及到内涵、外涵和外流三股不同总温总压气流的相互作用,存在明显的亚声速、跨声速和超声速区域,流动状况极其复杂。本文基于国外大涵道比涡扇发动机排气系统,建立了外形参数化设计方法,通过CFD计算,分析研究了大
As one of the main components of aeroengine exhaust system, its aerodynamic shape, weight and performance of the engine and even aircraft have a great impact on the performance. However, the large bypass ratio turbofan engine split exhaust system involves the interaction of three different total temperature and total pressure airflows with connotation, outer connotation and outflow. There are obvious subsonic, transonic and supersonic flow fields, and the flow conditions are extremely complicated. In this paper, based on the large bypass ratio turbofan engine exhaust system abroad, the parametric design method of profile is established. By CFD calculation,