摘要
对一种吸气式高超声速飞行器/内流道一体化构形进行了马赫数7一级的风洞实验研究。结合测力、测压以及纹影照片等结果,分析了进气道处于关闭状态、通气起动状态及通气不起动状态时,飞行器的内外流特征和全机气动力特性。研究结果表明:(1)进气道的工作状态对飞行器的气动力特性有着显著影响。进气道处于通气起动状态时的升阻力系数最小,升阻比最大,进气道处于通气不起动状态时的升阻力系数随时间显著波动,但大小与进气道关闭状态接近。(2)升阻力系数骤增、进口附近及内流道收缩段时均静压突升、外压缩波系往复振荡等是高超声进气道不起动时的主要特征,可作为实验上判别内流道起动/不起动状态的依据。
An experimental study is conducted on an airframe/engine integrated hypersonic vehicle like X43-A at a Mach number of 7.And the inlet start/unstart influences on the internal and external flow pattern of the hypersonic vehicle are obtained.Results indicate:(1) Inlet start/unstart has remarkable impacts on the aerodynamic characteristics of the aircraft.During the started operation,the aircraft can achieve the best aerodynamic performance with the highest lift-drag ratio and the lowest drag coefficient.On th...
出处
《宇航学报》
EI
CAS
CSCD
北大核心
2007年第6期1488-1493,共6页
Journal of Astronautics
基金
国家自然科学基金(50606017)
