中心线形状对S形二元收敛喷管雷达隐身设计的影响  

Impact of Centerline Shape of S-shaped Two-dimensional Convergent Nozzle on Radar Stealth Design

作　　者：傅莉 王俊华 宫禹 徐悦 FU Li;WANG Jun-hua;GONG Yu;XU Yue(School of Automation,Shenyang Aerospace University,Shenyang 110136,China;Chinese People’s Liberation Army Unit 93808,Lanzhou 730000,China;Aircraft Design and Research Institute of Shenyang,Shenyang 110135,China;Aviation Industry Shenyang Aircraft Industry(Group)Co.LTD,Shenyang 110000,China)

机构地区：[1]沈阳航空航天大学自动化学院,沈阳110136 [2]中国人民解放军93808部队,兰州730000 [3]航空工业沈阳飞机设计研究所,沈阳110135 [4]航空工业沈阳飞机工业(集团)有限公司4,沈阳110000

出　　处：《航空发动机》2022年第6期7-10,共4页Aeroengine

基　　金：国家自然科学基金(61074090);辽宁省社会科学基金(L12D2v070)资助。

摘　　要：为了探求中心线形状对S形二元收敛喷管电磁散射特性的影响规律,在S形二元收敛喷管进出口面积、偏心距、面积变化规律不变的条件下,结合超椭圆方法设计了5种不同中心线形状变化规律的S形二元收敛喷管,采用多层快速多极子方法对上述5种喷管进行了雷达散射截面(RCS)仿真计算和分析。结果表明:5种不同中心线形状变化规律的S形二元收敛喷管在不同频率和不同极化条件下表现出不同变化规律的雷达隐身特性;综合分析中心线形状C(缓急相当)的喷管整体雷达隐身性能较好,RCS平均值最高为0.953 dBm2、最低为-1.3 dBm2;中心线形状E(前急后缓)的喷管,RCS平均值为1.6 dBm2~2.209 dBm2;中心线形状B的喷管雷达隐身性能最差,RCS平均值最高为2.71 dBm2、最低为0.081 dBm2。To evaluate the impact of centerline shape of S-shaped two-dimensional convergent nozzle on the electromagnetic scattering characteristics,while keeping the inlet and outlet area,offset,and area variation rule unchanged,five S-shaped two-dimensional convergent nozzles with different centerline shapes were designed by adaptive hyperelliptic method,and simulation and analysis of their radar cross section(RCS) conducted using Multilevel Fast Multipole Method(MLFMM). The results show that the radar stealth characteristics of these nozzles with different centerline shapes vary under different frequencies and polarization conditions. The overall radar stealth performance of the nozzle with centerline C(modest turning at entrance and exit)is the best,with RCS average ranging from-1.3 dBm~2 to 0.953dBm~2;The second best is the nozzle with the centerline E(rapid turning at the entrance and slow turning at exit),with RCS average ranging from-2.009 dBm~2 to 1.61dBm~2,the nozzle with centerline B is the worst,with RCS average ranging from 0.08 dBm~2 to 2.71 dBm~2.

关 键 词：S形二元收敛喷管 中心线形状 雷达散射截面 多层快速多极子方法 航空发动机 

分 类 号：V355.12[航空宇航科学与技术—人机与环境工程]