为确定部分填充多孔介质圆管内传热最优的填充方式，对部分填充多孔介质圆管中的强迫对流传热开展研究。在圆管的外表面施加恒定热流，假设管内的流动和传热均处于充分发展段，分别采用达西-布林克曼模型和局部非热平衡模型描述管内流动与传热，获得管内速度场、温度分布、努塞尔数和熵产的解析解，重点讨论达西数、应力跳跃系数等相关参数对圆管中流动与综合换热性能的影响。结果表明：随着填充比的变化，部分填充多孔介质圆管中努塞尔数和熵产分别存在最大值和最小值。

In order to determine the optimal filling method for heat transfer in the tube partially filled with porous medium,the forced convection heat transfer in a tube partially filled with porous medium was investigated.The outer surface of the tube was exposed to a constant heat flux.Thermally and hydrodynamically fully developed conditions were assumed in the tube.The Darcy Brinkman model and the local thermal nonequilibrium conditions were utilized to describe the fluid flow and heat transfer,respectively.Using the stress jumping interface condition,the analytical solutions of the velocity field,temperature distribution,the Nusselt number and the entropy generation rates in the tube were obtained for the first time.The influence of several pertinent parameters on fluid flow and comprehensive heat transfer performance were discussed,such as Darcy number and stress jump coefficient.The results indicate that with the increase of filling ratio,the Nusselt number and total entropy generation of the tube partially filled with porous media have the maximum and minimum values,respectively.

TK124

国家自然科学基金(51476063)