“X”型布局锯齿唇口进气道的超声速飞行器气动与隐身一体化研究  

Integrated Investigation of Aerodynamic Shape and Stealth Performance for Supersonic Vehicle with“X”Sawtooth Lip Inlet

作　　者：郑日升[1] 戚开南 张庆兵[1] 肖志河 刘恒军[1] 

机构地区：[1]北京电子工程总体研究所,北京100854 [2]电磁散射重点实验室,北京100854

出　　处：《推进技术》2017年第11期2471-2478,共8页Journal of Propulsion Technology

摘　　要：针对"X"型布局超声速飞行器气动外形与隐身性能一体化设计研究,采用标准k-ωSST湍流模型和多层快速多极子(MLFMA)数值计算方法,对比分析了有/无锯齿进气道唇口飞行器流动机理和散射机理,获得了有/无进气道唇口的气动性能和飞行器的雷达散射截面(RCS)。研究结果表明:在入射频率15GHz时,采用锯齿外形进气道唇口的飞行器在垂直极化(VV)和水平极化方式(HH)时能够降低飞行器的RCS;在锯齿区域附近出现大量的小尺度激波和涡流结构,扰乱了进气道正常流动;无锯齿时,进气道流量系数较大,其次是锯齿角度为90°外形,锯齿角度为45°时进气道的流量系数相对最小,主要是因为锯齿角度45°时的进气道进口泄漏量相对较小;得到了无锯齿时进气道的总压损失最小,同时,无锯齿进气道唇口飞行器的阻力系数相对较小。In order to study integrated design of aerodynamic shape and stealth performance of the super- sonic vehicle, the κ-ε SST and multilevel fast muhipole algorithm （MLFMA） is applied in this study and both the flow mechanism and scattering mechanism are analyzed with/without sawtooth. The aerodynamic performance and radar cross section （RCS） are obtained for the vehicle. The results show that RCS is reduced for the vehicle with sawtooth inlet lip by vertical polarization （VV） and horizontal polarization （HH） when frequency is 15GHz. A large number of small scale shock wave and vortex structure are found near the inlet lip. The normal flow of in- let is disrupted. Flow coefficient is the largest without sawtooth and it is smaller with the angle of sawtooth is 90°. The flow coefficient is the smallest when the angle of sawtooth is 45°. And inlet total pressure loss is the minimum without sawtooth. And the drag coefficient is smaller without sawtooth.

关 键 词：隐身 雷达散射截面 气动外形 高分辨一维距离像 流量系数 总压恢复系数 阻力系数 超声速飞行器 进气道 

分 类 号：V19[航空宇航科学与技术—人机与环境工程]