变循环发动机后向雷达隐身性能计算  

Backward radar stealth performance calculation of variable cycle engine

作　　者：崔金辉 李大为 CUI Jin-hui;LI Da-wei(AECC Shenyang Engine Research Institute,Shenyang 110015,China)

机构地区：[1]中国航发沈阳发动机研究所,沈阳110015

出　　处：《燃气涡轮试验与研究》2021年第3期1-5,共5页Gas Turbine Experiment and Research

摘　　要：为分析带分流环的变循环发动机后向雷达隐身性能,利用物理光学迭代法对带分流环的变循环发动机和不带分流环的常规构型发动机分别进行了后向隐身性能计算,得到了两种类型发动机在不同电磁波入射方位角时的雷达散射截面积(RCS),并借助感应电流的分析方法对计算结果进行了解释和对比分析。研究结果表明,相对于常规构型发动机,带分流环的变循环发动机具有更加优异的雷达隐身性能,不同入射方位角下的RCS均更小;分流环的存在很大程度上降低了发动机的电磁信号特征。物理光学迭代法在计算发动机隐身特性方面具有较高的精度。In order to analyze backward radar stealth performance of variable cycle engine(VCE)with split⁃ter ring,iterative physical optic method was used to calculate backward radar stealth performance of both VCE with bypass splitter lip and general configuration engine without bypass splitter lip.Radar cross sec⁃tion(RCS)in different azimuth angles was obtained.The RCS was analyzed and explained by comparing the induced electric current on the inner wall.The analysis results show that VCE with bypass splitter lip has lower RCS in different azimuth angles and presents better stealth performance comparing with general con⁃figuration engine.The bypass splitter lip could decrease the engine electromagnetic characteristics greatly.Iterative physical optic method has high accuracy in computing stealth performance.

关 键 词：变循环发动机 雷达散射截面积 物理光学迭代法 分流环 隐身性能 感应电流 

分 类 号：V271.4[航空宇航科学与技术—飞行器设计]