单边膨胀球面2元喷管雷达隐身修形研究  

Study on Radar Stealth Shaping for Single Expansion Ramp with Spherical 2-D Nozzle

作　　者：杨胜男[1] 邵万仁[1] 尚守堂[1] 邓洪伟[1] 

机构地区：[1]中航工业沈阳发动机设计研究所,沈阳110015

出　　处：《航空发动机》2016年第5期55-62,共8页Aeroengine

基　　金：航空科学基金(2011ZA06001)资助

摘　　要：针对单边膨胀球面2元喷管,采用斜切出口的方式进行雷达隐身修形设计。利用迭代物理光学(IPO)方法和等效边缘电磁流(EEC)方法进行电磁散射仿真研究,分析喷管修形设计中出口斜切角度对喷管后向散射场的影响,经仿真分析得出,水平极化下斜切角度为25°的喷管具有较低的散射特性,而垂直极化下斜切角度为15°的喷管后向隐身效果较好。The single expansion ramp with spherical 2-D nozzle was shaped by oblique cutting. Combining Iterative Physical Optics（IPO） with Equivalent Edge Currents（EEC） method, the radar scattering field was simulated. The influence of outlet oblique angle on backscattering field of nozzle in shaping design of nozzle was analyzed. The results show that 25 degrees oblique nozzle model has the characteristics of low scattering in horizontal polarization, and 15 degrees oblique nozzle model has good backward stealth effect in vertical polarization.

关 键 词：雷达隐身 隐身修形 航空发动机 排气系统 雷达散射截面 

分 类 号：V228.8[航空宇航科学与技术—飞行器设计]