喷气发动机红外辐射建模与仿真

分析了喷气发动机红外辐射的主要来源,研究了喷气式发动机红外辐射建模与仿真的方法,给出了不考虑散射时某一空间位置处探测元辐照度的计算方法和步骤.根据壁面辐射线传递路线将微元面或微元体划分为三种情况,分别论述了各自的离散与计算方法.流场计算时使用Fluent组分模型计算燃气H2O和CO2的摩尔浓度.在计算辐照度时,使用了经典的表格法和低分辨率计算模型LOWTRAN7研究大气辐射传递特性的影响.最后,用介绍的微元离散法编制了程序计算了圆出口截面与探测面连线天顶角不同时的辐照度值,验证了该方法的有效性.

Jet engine Infrared Signature Modeling and Simulation

Primary sources of jet engine infrared radiation were analyzed.Numerical modeling and simulation methods of infrared radiation of it are studied and the approach and procedures for computing the irradiance of the detector on some position when ignoring scatterance are also give out.When computing,the micro-wall and micro-volume has been divided into three type according to the transmission path of radial line.Discretization and computation methods has been discussed respectively.CFD software package Fluent ...