| 傅 莉1 ，王俊华 2 ，宫禹3 ，徐悦4.中心线形状对S形二元收敛喷管雷达隐身设计的影响[J].航空发动机,2022,48(6):7-10 |
| 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 |
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| DOI： |
| 中文关键词: 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 |
| 英文关键词:S-shaped two-dimensional convergent nozzle centerline shape radar cross section multilevel fast multipole method aeroengine |
| 基金项目:国家自然科学基金（61074090）、辽宁省社会科学基金（L12D2v070）资助 |
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| 中文摘要: |
| 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 dBm 2 、最低为-1.3 dBm 2 ；中心线形状E（前急后缓）的喷管，RCS平均值为1.6 dBm 2 ～2.209 dBm 2 ；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 dBm 2 、最低为0.081 dBm 2 。 |
| 英文摘要: |
| To evaluate the impact of centerline shape of S-shaped two-dimensional convergent nozzle on the electromagnetic scatter?
ing characteristics，while keeping the inlet and outlet area，offset，and area variation rule unchanged，five S-shaped two-dimensional con?
vergent 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 perfor?
mance 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 0.953
dBm 2 ；The second best is the nozzle with the centerline E（rapid turning at the entrance and slow turning at exit），with RCS average rang?
ing 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 . |
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