摘要
为了提升发动机排气系统后向雷达隐身能力,针对雷达波强散射源加力燃烧室拟定了5种吸波材料涂覆方案,利用弹跳射线法仿真分析了加力燃烧室涂覆吸波材料对排气系统S波段、X波段典型频点在方位角-30°~+30°内水平极化与垂直极化RCS分布规律,以及方位角0°时X波段典型频点的SAR成像。结果表明:雷达波强散射源在S波段、X波段的分布规律具有一致性,不同吸波材料涂覆方案对两个波段RCS缩减效果的影响规律相似。火焰稳定器是排气系统中雷达特征信号最强的散射源,其涂覆雷达吸波材料对缩减排气系统雷达特征信号收益最大。在加力内锥、火焰稳定器、波瓣混合器、加力筒体4个部位均涂覆吸波材料是对两个波段RCS缩减效果最好的吸波材料涂覆方案,对S波段水平极化、垂直极化RCS均值缩减效果达92.3%和92.0%,对X波段水平极化、垂直极化RCS均值缩减效果达90.2%和88.4%。
In order to improve the backward-facing radar stealth capability of the engine exhaust system,five coating schemes for afterburner,which is radar wave strong scattering source,are formulated.The influence of afterburner coating absorbing materials on the horizontal polarization and vertical polarization RCS distribution pattern of the exhaust system in the range of-30°~+30°azimuth of the typical frequency point in the S-band and X-band is analyzed by using the shooting and bouncing rays,also SAR imaging of typical frequency points in the X-band at an azimuth angle of 0°is simulated.The results show that the distribution of strong scattering sources in S-band and X-band is basically the same,and the influence of different coating schemes of absorbing materials on the RCS reduction effect of two bands is similar.The flame stabilizer is the strongest scattering source of radar characteristic signal,and coating it with radar absorbing materials has the greatest benefit on reducing the radar characteristic signal of the exhaust system.Coating absorbing materials in the four parts of afterburner inner cone,flame stabilizer,lobe mixer and afterburner cylinder is the best absorbing material coating scheme for the reduction effect of RCS in the two wave bands.The average RCS reduction effect of horizontal polarization and vertical polarization in S band is 92.3%and 92.0%,and the average RCS reduction effect of horizontal polarization and vertical polarization in X-band is 90.2%and 88.4%.
作者
陈瀚赜
李中生
邓洪伟
杨胜男
王旭
王群
Chen Hanze;Li Zhongsheng;Deng Hongwei;Yang Shengnan;Wang Xu;Wang Qun(AECC Shenyang Engine Research Institute,Shenyang 110015,China;Second Military Representative Office of Air Force Equipment Department in Shenyang Area,Shenyang 110043,China)
出处
《航空兵器》
CSCD
北大核心
2023年第6期89-95,共7页
Aero Weaponry
基金
省部级基金项目(JCKY2021213B013)。
关键词
加力燃烧室
排气系统
吸波材料
雷达散射特性
弹跳射线法
发动机
afterburner
exhaust system
absorbing material
radar scattering characteristics
shooting and bouncing rays
engine
