吸波材料脱落对球面收敛喷管电磁散射特性的影响  

Influence of RAM abscission on electromagnetic scattering characteristic of cavity

作　　者：郭霄 杨青真[2] 文振华 李树豪 方鹏亚 GUO Xiao;YANG Qingzhen;WEN Zhenhua;LI Shuhao;FANG Pengya(School of Aeronautical Engineering,Zhengzhou University of Aeronautics,Zhengzhou 450046,China;School of Power and Energy,Northwestern Polytechnical University,Xi'an 710029,China)

机构地区：[1]郑州航空工业管理学院航空工程学院,郑州450046 [2]西北工业大学动力与能源学院,西安710029

出　　处：《航空学报》2021年第6期411-418,共8页Acta Aeronautica et Astronautica Sinica

基　　金：国家自然科学基金(51975539);航空科学基金(2018ZD55008);河南省高等学校重点科研项目计划(20B590005);河南省青年人才托举工程(2021HYTP017)。

摘　　要：在雷达吸波材料(RAM)涂覆位置影响球面收敛喷管(SCFN)雷达散射特性的结论上,研究了雷达吸波材料的脱落对SCFN雷达散射截面积(RCS)缩减效果的影响规律,采用加入阻抗边界条件的迭代物理光学(IPO)方法,计算了SCFN在5种不同脱落概率下的电磁散射特性。研究结果表明:吸波材料涂层的脱落会增加SCFN的RCS幅值;在俯仰探测面当脱落概率达到0.7时,依然能够保持68.19%的RCS缩减能力;在偏航探测面,当脱落概率达到0.5时,需要及时对吸波材料涂层进行修复。To research the influence of Radar Absorbing Material(RAM)abscission on the RCS reduction ability of Spherical Convergent Flap Nozzle(SCFN),the electromagnetic scattering characteristic of the nozzle under different abscission probability were studied by using the Iterative Physical Optical(IPO)with the impedance boundary condition based on the research on the coating medium at different parts.The research shows the value of the RCS of the SCFN would increase with the abscission probability increasing.The RAM which has not been fallen off can maintain 68.19%of the RCS reduction ability when the abscission probability reaches 0.7 in the pitch plane.While the RAM should be coated again when the abscission probability reaches 0.5 in the yaw plane.

关 键 词：雷达吸波材料 脱落概率 迭代物理光学 阻抗边界条件 雷达散射截面积 

分 类 号：V273[航空宇航科学与技术—飞行器设计]