一种并行真实进气道RCS计算方法

A Parallel RCS Calculation Method of the Real Inlet

进气道是飞行器头部方向3大强散射源之一,目前国际上工程实用的算法主要以射线法为主,射线法在解决大长径比、大S弯进气道时误差较大,难以满足工程中进气道隐身方案设计的需求。文中选用精度较高的迭代物理光学法,采用快速多极子方法对面元之间的相互影响进行加速,辅以基于MPI的并行技术,在32节点计算平台上模拟了真实进气道尺寸大小的腔体X波段的RCS,计算结果和模式法结果吻合良好,验证了该方法具有真实进气道X波段RCS预估能力。

As one of strong scattering sources of the aircraft head,RCS calculation methods of the inlet are usually based on ray tracing theory.But when solving large S bend,aspect ratio and incidence angle,these methods can produce big errors.The analysis of iterative physical optics method,with FMM and MPI is used to increase processing capacity.On the 32-node computing platforms,RCS of the real size inlet in X-band is achieved.The results agree well with those obtained by model method.It shows that the method can estimated the true inlet RCS.