直升机武器外挂的隐身设计与RCS计算  

Stealth Design and RCS Calculation for Helicopter External Weapon Stores

作　　者：侯雪剑 刘昊雨 张云飞[1] 吴裕平[2] HOU Xuejian LIU Haoyu ZHANG Yunfei WU Yuping(School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China China Helicopter Research and Development Institute, Jingdezheng 333001, China)

机构地区：[1]北京航空航天大学航空科学与工程学院,北京100191 [2]中国直升机设计研究所,江西景德镇333001

出　　处：《直升机技术》2017年第3期10-13,19,共5页Helicopter Technique

摘　　要：建立某直升机武器外挂的外形模型,采用物理光学法和等效电磁流法计算了武器外挂在HH极化、2~18GHz频率的RCS特性。进行武器外挂RCS减缩研究,提出了直升机武器外挂整形罩的隐身设计方法,将原武器外挂在4个波段、三个重要方向下的RCS水平从1.5m^2~18.6m^2降低到0.004 m^2~0.06 m^2,减缩量达23~40dB,有效降低了其在主要散射方向上的雷达散射水平。分析了改型前后的气动特性,保证了改型对直升机的气动性能影响较小。It was established for a outline model of helicopter external stores,and the physical optics and the equivalent currents theory were used to calculate the RCS of the external stores. It was put forward that the stealth design method of outline shaping cover for helicopter RCS reduction in three important direction. The average RCS of the external weapon store has been reduced form1. 5m^2～ 18. 6 m^2 to 0. 004m^2～ 0. 05m^2 at four frequency band. The RCS reduction value reaches to 23 ～ 40 dB. By analysis of CFD,the aerodynamic drag of the external stores has no significantly increase.

关 键 词：武器外挂 RCS 雷达隐身技术 直升机 

分 类 号：V218[航空宇航科学与技术—航空宇航推进理论与工程]