高速大钝头体电磁散射特性地面测试技术  

Ground measurement technology for electromagnetic scattering characteristics of high speed blunt body

作　　者：邵忠杰 谌君谋 林键[1] 陈星[1] 纪锋[1] 姚大鹏[1] Shao Zhongjie;Shen Junmou;Lin Jian;Chen Xing;Ji Feng;Yao Dapeng(China Academy of Aerospace and Aerodynamics,Beijing 100074,China)

机构地区：[1]中国航天空气动力技术研究院,北京100074

出　　处：《航天电子对抗》2022年第4期46-49,共4页Aerospace Electronic Warfare

摘　　要：针对高速目标进入大气层过程中周围空气产生的电磁散射特性,利用大尺寸FD-21高焓激波风洞,开展等离子鞘套包履大钝头体模型的电磁散射测量实验。利用矢量网络仪的步进扫描技术,在X波段开展试验,获得自由流速度3 km/s、静压578 Pa条件下等离子鞘对大钝头体模型雷达散射截面(RCS)的影响。通过大钝头体模型静态RCS测量,获取其有无高速气流状态下的RCS特征信息,在有等离子鞘套包履条件下,大钝头体RCS特性明显增强。The electromagnetic scattering characteristics of the surround air are studied when the high speed target enters the atmospheric.The electromagnetic scattering measurement of plasma sheath enveloped large blunt body model is carried out in FD-21 high enthalpy shock tunnel.Using the step frequency sweeping mode of commercial instrument,the influence of the plasma sheath on the target RCS(radar cross section)in the X band are successfully and clearly observed under the free stream velocity of 3 km/s and static pressure of 578 Pa.Through the static RCS measurement of the large blunt body model,the RCS characteristic information of the large blunt body model with/without high speed airflow is obtained.The RCS characteristic of the large blunt body is obviously enhanced under the condition of plasma sheath.

关 键 词：电磁散射 高焓激波风洞 等离子鞘套 雷达散射截面 

分 类 号：V411.7[航空宇航科学与技术—航空宇航推进理论与工程]