摘要
采用高频方法计算分析了某战术通用直升机的雷达散射特性、重要散射源以及频率特性。对直升机机头、进气口、机身侧面、旋翼桨毂、垂直尾翼、尾桨桨毂及减速器舱、尾喷管、起落架等采取了外形隐身设计措施。对隐身直升机缩比模型的RCS测试与计算结果表明,在保证流线型机身和装载容积的条件下,隐身直升机相对于原型外形变化较小,雷达散射水平在头向和侧向分别降低至原型的约10%和1%,达到了比较好的隐身状态,为军用直升机隐身设计提供了重要的参考。
The high-frequency method was used to compute a tactical utility helicopter＇ s RCS, then its RCS characteristics and main scattering sources were analyzed. RCS reduction research was done by modifying the geometric shape of its main scattering sources. Under the condition of streamline and loading volume, the result of the RCS experiment on the stealth designed scale model and calcu- lation shows that with little change of the shape, the average RCS of the modified utility helicopter in forward and side direction is equivalent to 10% and 1% of the conventional one respectively. The result was satisfactory, it could provide other stealth helicopter design a significant reference.
出处
《直升机技术》
2014年第1期11-15,21,共6页
Helicopter Technique
基金
总装"十二五"重点预研项目
关键词
高频方法
通用直升机
RCS减缩
RCS试验
high-frequency method
utility helicopter
RCS reduction
RCS experiment
