管内层流入口段插入多孔环体的传热特性  

Heat transfer characters of the tubes inserted with ring porous in developed laminar flow

作　　者：黄志锋[1] 刘伟[1] 刘志春[1] 杨昆[1] 

机构地区：[1]华中科技大学能源与动力工程学院,湖北武汉430074

出　　处：《华中科技大学学报（自然科学版）》2010年第11期88-91,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家重点基础研究发展计划资助项目(2007CB206903)

摘　　要：以核心流强化传热原理为基础,以空气为流动介质,对圆管内插入多孔环体在层流入口段的传热及流动综合性能进行了数值分析,并运用场协同理论加以验证.结果表明:在入口段填充多孔环体可以有效提高换热与流动的综合性能,其性能评价指标值最高可达2左右.多孔材料的孔隙率对综合性能的影响最为明显,孔隙率越高,综合性能越好;而当孔半径为1.0mm时可获得最佳的综合性能.Based on the concept of heat transfer enhancement in the core of a tube,taking air as a flow media,the integrated performance of heat transfer and flow in a tube inserted with ring porous under developed laminar flow condition were numerically analyzed and the result were verified.Results indicate that the integrated performance of the heat transfer and flow were effectively enhanced,which could result in a performance evaluation criteria value up to about 2.Additionally,the analysis also found that the porosity of the porous media has a prominent impact on the integrated performance of heat transfer enhancement in a tube;the greater the porosity,the better the heat transfer performance.The best performance could be obtained when the inner diameter of the ring porous is 1.0mm.

关 键 词：强化换热 多孔介质 场协同理论 内插物 层流入口段 

分 类 号：TK224[动力工程及工程热物理—动力机械及工程]