发动机总体与尾喷管三维并行设计研究

为解决某型涡扇发动机尾喷管改型中的流量匹配问题,利用iSIGHT软件平台集成零维发动机性能计算程序和三维混合室和尾喷管的流场计算程序,运用数值缩放(Zooming)技术,实现了混合室和尾喷管型面以及进出口面积的自动修正,解决了尾喷管和发动机流量匹配的问题,并准确地反映了混合室和尾喷管三维流动效应对流量系数、推力系数以及发动机工作点的影响.该方法可为实现涡扇发动机其它部件的Zooming技术提供有意义的参考.

Parallel design of turbo engine and three-dimensional nozzle

In order to solve the problem of mass flow match between aero-engine and nozzle in the performance simulation,0-D engine performance simulation programs and 3-D mixer and nozzle computation fluid dynamics software were integrated into iSIGHT platform.The method was presented solving the mass flow match and integrating multi-level of complexity analysis techniques(Zooming technology) that captured the appropriate physics of mixer and nozzle at the 3-D state for engine systems.By means of iteration computation of programs between 0-D and 3-D,the models and areas of the mixer and nozzle were adjusted automatically.The thrust coefficient and flow coefficient of nozzle were obtained at the same time.This method may provide a reference to application of Zooming technology in other parts of turbofan engines.