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结合物理光学迭代法(IPO)和等效棱边电磁流法(EEC),自主开发了电大尺寸腔体电磁散射特性计算程序,并通过对某试验模型雷达散射截面积(RCS)进行计算,完成了程序的可靠性验证。利用该程序对带有电磁信号遮挡板且采用3种不同尾缘修形技术的球面收敛调节片矢量喷管(SCFN)进行了RCS数值模拟研究。结果表明:随着入射方位角的增大,喷管的RCS整体上有减小的趋势;喷管尾缘的修形只有在雷达波以较大方位角入射时对减小RCS效果明显;电磁信号遮挡板的存在很大程度上减弱了喷管的电磁信号特征。
Combined with the physical optical iteration method (IPE) and the equivalent edge electromagnetic flow (EEC), the electromagnetic scattering characteristic calculation program of large size cavity is developed. By calculating the RCS of a test model, The program’s reliability verification. The RCS numerical simulation of a spherical convergent regulator vector nozzle (SCFN) with an electromagnetic signal shield and three different trailing edge modification techniques was carried out using the program. The results show that as the incident azimuth angle increases, the RCS of the nozzle tends to decrease as a whole. The modification of the nozzle trailing edge is only effective in reducing the RCS when the radar wave is incident at a large azimuth angle. The existence of the signal mask greatly weakens the electromagnetic signal characteristics of the nozzle.