CAJ | 학술논문

基于研究大宽高比对S形二元喷管的电磁散射特性的影响的目的.在S形二元喷管进出口面积、偏心距、面积变化规律及中心线变化规律不变的条件下，采用自适应超椭圆方法设计了出口宽高比为4.5~8.0的S形二元喷管.采用等效边缘电磁流法与迭代物理光学法分别分析了8种S形二元收敛喷管的出口边缘绕射场及总散射场的电磁散射特性.研究结果表明：在水平、垂直两种极化方式下，喷管出口宽高比的变化对S形二元收敛喷管边缘绕射场的RCS影响较小.喷管出口宽高比的变化对总散射场的RCS影响较大；在水平极化下，宽高比为5.5的S形二元喷管散射场的RCS在大的探测范围内有较小的RCS
기우연구대관고비대S형이원분관적전자산사특성적영향적목적.재S형이원분관진출구면적、편심거、면적변화규률급중심선변화규률불변적조건하，채용자괄응초타원방법설계료출구관고비위4.5~8.0적S형이원분관.채용등효변연전자류법여질대물리광학법분별분석료8충S형이원수렴분관적출구변연요사장급총산사장적전자산사특성.연구결과표명：재수평、수직량충겁화방식하，분관출구관고비적변화대S형이원수렴분관변연요사장적RCS영향교소.분관출구관고비적변화대총산사장적RCS영향교대；재수평겁화하，관고비위5.5적S형이원분관산사장적RCS재대적탐측범위내유교소적RCS
Based on the purpose of the influence of the large width-height ratio on the S shaped nozzles electricity scattering characteristics. Keeping the outlet area、eccentricity、area regularity and center line regularity, the adaptive super-ellipse method was adopted to design several S shaped 2D nozzles with different width height ratio from 4.5 to 8.0. Based on Iterative Physical Optics Algorithm and equivalent edge currents (EEC), The electricity scattering characteristics of outlet edge diffraction field and total scattering field of 8 different S shaped 2D nozzles under horizontal or vertical polarization mode was analyzed. The result indicates that under horizontal or vertical polarization mode the width height ratio of outlet have less effect on the RCS of nozzle edge diffraction field and have large influence on total scattering field. The width height ratio influence the detection probabilities. Under horizontal polarization way, in the large range of the detection angle the total scattering filed has lower RCS while the width-height ratio is 5.5.