自然对流条件下两种垂直放置纵向翅片管传热特性的数值分析  

Numerical study on heat transfer performance of two types longitudinal finned tube in free convection

作　　者：邱燕[1] 田茂诚[1] 孙平[1] 程林[1] 

机构地区：[1]山东大学能源与动力工程学院,山东济南250061

出　　处：《山东大学学报（工学版）》2005年第4期30-34,共5页Journal of Shandong University（Engineering Science）

摘　　要：采用数值计算的方法对垂直放置的封闭式纵向翅片管和开放式纵向翅片管自然对流条件下的传热特性进行研究,得到了在基管恒壁温条件下两种不同类型翅片管周围的温度场与速度场,及其散热量、金属热强度及自然对流换热系数.结果表明,封闭式纵向翅片管的散热量、金属热强度以及自然对流换热系数都要高于开放式翅片管.因此在结构参数一定时,封闭式纵向翅片管要优于开放式翅片管.Numerical computation methods were adopted to study heat transfer performance of longitudinal closed firmed tube and opening finned tube in free convection, The temperature field, velocity field, heat dissipating capacity of two different types of finned tubes as well as free convection heat transfer coefficient under the condition of constant temperature of parent tube were obtained. As a result, heat dissipating capacity, metal thermal intensity and free convection heat transfer coefficient of the longitudinal closed finned tube are higher than those of the open finned tube. Therefore, longitudinal closed finned tube is superior to the open finned tube with the same structure parameters.

关 键 词：数值计算 封闭式翅片管 开放式翅片管 自然对流 

分 类 号：TK124[动力工程及工程热物理—工程热物理]