偏心比对S形流道雷达散射特性的影响

发布时间：2018-02-16 12:11

本文关键词： 偏心比迭代物理光学法等效边缘电磁流法单端开口腔体散射绕射雷达散射截面隐身技术　出处：《燃气涡轮试验与研究》2016年04期 　论文类型：期刊论文

【摘要】：在进/出口形状、进/出口面积、中心线变化规律、面积变化规律等设计参数不变的条件下,采用超椭圆方法设计了11种不同偏心比的S形流道。同时,借助迭代物理光学法与等效边缘电磁流绕射方法,对不同偏心比的S形流道进行了雷达散射特性的数值仿真分析。结果表明:若将不同偏心比S形流道的雷达散射截面变化曲线看作是波的传播轨迹,相对于偏心比为0的流道,偏心比改变了波的相位、振幅;偏心比越大,其相位越滞后、振幅越小。
[Abstract]:Under the condition of constant design parameters such as inlet / outlet shape, inlet / outlet area, centerline variation rule and area variation rule, 11 S-shaped channels with different eccentricity ratios are designed by hyperelliptic method. By means of iterative physical optics method and equivalent edge electromagnetic flow diffraction method, The radar scattering characteristics of S-shaped channel with different eccentricity ratios are numerically simulated. The results show that the radar cross section variation curve of S-shaped channel with different eccentricity ratio is regarded as the propagation track of the wave, and is relative to the channel with zero eccentricity ratio. The eccentricity ratio changes the phase and amplitude of the wave, and the larger the eccentricity ratio, the slower the phase and the smaller the amplitude.
【作者单位】：中国涡轮燃气研究院;西北工业大学动力与能源学院;
【分类号】：V218

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