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一种组合发动机变几何进气道流场特性研究
引用本文:张华军,梁德旺,郭荣伟.一种组合发动机变几何进气道流场特性研究[J].航空动力学报,2009,24(10):2201-2207.
作者姓名:张华军  梁德旺  郭荣伟
作者单位: 
摘    要:对一种组合发动机变几何进气道各马赫数下不同几何形状的三维流场进行了数值模拟.研究了不同马赫数时进气道的流场特征及气动性能.结果表明:随着来流马赫数的减小,外压段的超声溢流不断增大,进气道的流量系数不断减小;第一道内压缩波及其反射点位置对组织管道内的流场有着非常重要的作用;当有反压作用时,会在扩张段内形成激波串,激波串的形状和位置与来流马赫数、反压大小及管道内的流动有关.研究结果对类似进气道的几何调节方式有一定的指导意义.

关 键 词:组合发动机  变几何进气道  反压特性  数值模拟
收稿时间:2008/10/16 0:00:00
修稿时间:2008/12/30 0:00:00

Study of flow characteristics for a variable geometry inlet on combined engine
ZHANG Hua-jun,LIANG De-wang and GUO Rong-wei.Study of flow characteristics for a variable geometry inlet on combined engine[J].Journal of Aerospace Power,2009,24(10):2201-2207.
Authors:ZHANG Hua-jun  LIANG De-wang and GUO Rong-wei
Affiliation:College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics,College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics,College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics
Abstract:The 3-D flow fields in a variable geometry inlet on combined engine at different Mach numbers are numerically analyzed. The characteristics of the flow in the inlet at different Mach numbers have been compared and discussed. The results show that the spillage increases and the mass flow ratio decreases with the increase of the Mach number. The first internal shock and its reflective position are important to organize the flow field in the internal passage. With backpressure at the exit of the inlet, the shock train could be formed in the diffuser. The free stream Mach number, backpressure and flow condition in the internal passage determine the form and position of the shock train. The conclusions may be useful to the research for variable geometry inlet on combined engine.
Keywords:combined engine  variable geometry inlet  characteristics of backpressure  numerical simulation
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