摘要
座舱和进气道对飞行器隐身性能有重要作用。为分析座舱及进气道的散射影响特性,建立了四种包含不同部件的电磁模型,结合物理光学法和雷达截面积(RCS)均值相对增值概念,研究了RCS曲线分布影响、俯仰角响应特性、频率响应特性。结果表明:考虑隐身设计的座舱和进气道不改变散射分布特性,RCS曲线分布特性相似;俯仰角增加,座舱影响较小,进气道、混合座舱和进气道前向、后向、周向角域相对增值震荡性递增,频率增加,座舱对电磁散射影响不大,进气道、混合座舱和进气道的前向、后向角域的相对增值震荡减小。座舱对电磁散射影响较小,前向相对增值位于-2.4~1 dB之间,进气道对电磁散射影响较大,前向相对增值为2~12 dB。
The cockpit and inlet play an important role for aircraft stealth performance.In order to analyze the scattering characteristics of cockpit and inlet,four kinds electromagnetic models with different components are established.The influence of radar cross section(RCS)curve distribution,response of pitch angle and frequency are studied with Physical Optics method and RCS relative mean value.The results show that the scattering distribution is not changed by the cockpit and inlet with consideration of stealth design,and their distributions characteristics are similar.When the pitch angle increases,there exists small influence for the cockpit and the RCS relative mean values in nose,rear and circumferential directions of angular domains of inlet and mixed cockpit with inlet increase oscillatornly.When the frequency increases,there exist little effect on electromagnetic scattering of cockpit,and the the RCS relative mean values in nose and rear directions of inlet and mixed cockpit with inlet decrease oscillatorily.The influence of cockpit on electromagnetic scattering is weak,and the relative value in nose direction is between-2.4 to 1 dB;while the inlet has greater impact on electromagnetic scattering,and the relative value in nose direction is between 2 to 12 dB.
作者
刘战合
王菁
王晓璐
周鹏
石金祥
Liu Zhanhe;Wang Jing;Wang Xiaolu;Zhou Peng;Shi Jinxiang(School of Aeronautic Engineering,Zhengzhou University of Aeronautics,Zhengzhou 450046,China;School of Electronics and Communication Engineering,Zhengzhou University of Aeronautics,Zhengzhou 450046,China)
出处
《航空工程进展》
CSCD
2019年第4期528-535,共8页
Advances in Aeronautical Science and Engineering
基金
国家重点基础研究计划(973计划)(61320)
航空科学基金(2016ZA55001,2015ZD55005)
河南省科技攻关计划(182102210444,152102210137)
河南省自然科学基金(182300410159)
郑州航空工业管理学院青年骨干教师资助计划(2017-12)
关键词
座舱
进气道
电磁散射
隐身
RCS
cockpit
inlet
electromagnetic scatterings
stealth
RCS
aircraft
