【摘要】 为研究航空发动机中心锥锥角对发动机腔体电磁散射特性的影响,采用迭代物理光学法和矩量法计算了不同锥角下雷达散射截面(RCS)随探测角度的变化,分析了不同探测角度范围下RCS平均值的变化趋势。结果表明:在-6°～6°探测角下,中心锥半锥角45°为RCS均值峰值点,半锥角40°及60°时出现RCS均值波谷值;40°或60°半锥角可作为航空发动机中心锥设计参考值。更多还原

【Abstract】 The effect on electromagnetic scattering characteristics of central cone angle in aero-engine cavity was analyzed. The Radar Cross Section(RCS) of models with different central cone angles was calculated through Iterative Physical Optics(IPO) and Method of Moments(MOM), and the variation trend of the average RCS of different angular range was analyzed. The calculation results show that at detecting angle-6°～6°, the model with half central cone angle at 45° shows the highest average RCS at backward direction.With half central cone angle at 40° and 60°, the average RCS reaches the trough value. The half central cone angles at 40° and 60° are the recommended values for the design of aero-engine central cone.更多还原