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采用光线踪迹 /节点分析法研究了在漫反射、表面不透明、分界面半透明的两层平板状吸收、各向同性散射性非灰介质内的辐射与导热瞬态耦合换热。两层介质具有不同的辐射特性 ,折射率均大于等于 1。在考虑表面多次反射和介质多次散射的情况下 ,推导了复合层辐射传递系数 ,由辐射传递系数计算辐射热源项。在对流、辐射换热边界条件下 ,采用控制容积法求解瞬态能量方程 ,获得了复合层内的稳态、瞬态温度场和热流密度 ,与 Galerkin法的计算结果比较 ,表明该文的计算方法正确 ,精度高
The radiation and thermal conduction transient coupling heat transfer in two flat absorption plate with diffuse reflection, opaque surface and translucent interface are investigated by ray tracing / node analysis. Two layers of media have different radiation characteristics, the refractive index is greater than or equal to 1. Considering the multiple reflections of the surface and multiple scattering of the medium, the radiation transfer coefficient of the composite layer is derived, and the radiation heat source term is calculated from the radiation transfer coefficient. Under the convection and radiation heat transfer boundary conditions, the governing volume method was used to solve the transient energy equation, and the steady state, transient temperature field and heat flux density in the composite layer were obtained. Comparing with the Galerkin method, Method is correct, high precision