颗粒填充平行平板间流动与换热的边壁效应试验研究  

WALL EFFECT ON FLUID FLOW AND HEAT TRANSFER IN A PACKED CHANNEL BETWEEN TWO PARALLEL GROOVED PLATES

作　　者：吴伟[1] 杜建华[1] 卢太金[1] 马斌[1] 王补宣[1] 

机构地区：[1]清华大学热能工程系,北京100084

出　　处：《机械工程学报》2002年第10期20-23,共4页Journal of Mechanical Engineering

基　　金：国家自然科学基金(59995550-3);清华大学'985'基金资助项目。

摘　　要：考察了平行平板间流动与换热的边壁效应影响,测量了颗粒填充通道壁面温度分布,从而明确了板面开槽对流动和传热的作用机制。相同雷诺数的槽板平均表面换热系数是平板的2～3倍,同时减小了流动阻力。试验结果说明,开槽宽度与颗粒直径之间存在最佳组合。这为开发新型高效填充结构换热器提供了基础性的试验数据。Wall effects for fluid flow and heat transfer in a glass bead packed channel between two parallel grooved plates are investigated. The experimental results demonstrated that grooves on the heated surface changed the contact between the packed beads and the wall. The grooves on the heated surface lowered the flow resistance and enhanced the film heat transfer coefficient 2-3 times that of flat plates. The results suggest that a proper combination of packed beads and grooves can lead to the optimum heat transfer for a specific configuration.

关 键 词：颗粒填充 平行平板 边壁效应 强化换热 多孔介质 

分 类 号：TK124[动力工程及工程热物理—工程热物理]