采用射线踪迹、节点分析法研究了 3层吸收性介质层内的辐射和导热瞬态耦合换热 ,复合层表面及介质层交界面均半透明漫反射 .采用 1层和 2层辐射能量传递模型跟踪辐射能量在 3层介质内的传递 ,从而推导出了辐射传递系数 .运用辐射传递系数求解辐射源项 ,在辐射对流边界条件下 ,采用全隐格式求解瞬态能量方程 ,考察了介质层折射率及导热 辐射参数对耦合换热的影响 .比较分析结果表明 ,所研究的模型和计算结果是可信的 ,可向任意多层辐射能量传递模型推广 Radiation and thermal conduction coupling heat transfer in three layers of absorbent media were studied by ray tracing and nodal analysis, and the translucent and diffuse reflection at the interface of composite layer and dielectric layer were studied. The radiative energy transfer model of layer 1 and 2 The radiative transfer coefficients were deduced by the transfer of radiant energy in the three-layer medium. The radiative transfer coefficients were used to solve the radiative source. Under the condition of the convection boundary, the transient energy equation was solved by the all-implicit scheme. The dielectric layer refraction Rate and thermal radiation parameters on the coupling heat transfer.The results of comparative analysis show that the model and calculation results are credible and can be extended to any multi-layer radiative energy transfer model