漫反射下多层参与性介质内的耦合换热  

Coupled heat transfer in multi-layer participating media with diffuse reflection

作　　者：罗剑峰[1] 谈和平[1] 夏新林[1] 

机构地区：[1]哈尔滨工业大学能源科学与工程学院,黑龙江哈尔滨150001

出　　处：《哈尔滨工业大学学报》2001年第5期596-601,共6页Journal of Harbin Institute of Technology

基　　金：国家自然科学基金资助项目 ( 5 980 6 0 0 3) ;航天创新基金资助项目 .

摘　　要：用控制容积法结合射线踪迹法研究了辐射与对流边界条件下 ,三层参与性介质复合层内的瞬态耦合换热 .吸收、发射性复合层的两侧表面及内部各层间的交界面均为半透明漫反射 .采用射线踪迹法建立了一层和二层辐射传递模型 ;通过跟踪辐射能量 ,导出三层参与性介质内的辐射传递系数 .将辐射源项用辐射传递系数表示 ,应用Patankar方法将辐射源项式线性化 ,采用三对角阵算法求解线性化方程组即可得瞬态温度场 .考察了对流换热系数、吸收系数对三层复合层瞬态耦合换热的影响 .Transient coupled radiative and conductive heat transfer in a three-layer absorbing-emitting participating medium composite is studied by using control volume method in combination with ray tracing method under radiative and convective boundary condition. The surfaces and interfaces of the composite are semitransparent and diffusive. The ray tracing method is used to create one-layer and two-layer radiative energy transfer models, and the radiative transfer coefficients of the three-layer participating media are deduced by tracing the energy transferring in the composite. The radiative source term in the energy equation is expressed by radiative transfer coefficients. Patankar's method is applied to linearize the radiative source term, and is given by temperature distribution of the composite solving linearized equation via tri-diagonal matrix algorithm. The influences of convective coefficient and absorbing coefficient on coupled heat transfer are investigated in detail.

关 键 词：参与性介质 耦合换热 复合层 漫反射 边界层 辐射 射线踪迹法 

分 类 号：O432.1[机械工程—光学工程] TK124[理学—光学]