Φ42mm换热管内置铝制扭带强化传热特性的研究  

Research of Intensive Heat Transfer Characteristic by Using In-tube Aluminum Twisted Tape for Φ42 Tube

作　　者：张永秋[1] 林清宇[1] 易凯[1] 赵海全[1] 林榕端[1] 

机构地区：[1]广西大学化学化工学院,南宁530004

出　　处：《化工设备与管道》2009年第1期20-22,共3页Process Equipment & Piping

基　　金：广西自然科学基金(桂科青0447005):微型液轮机强化传热研究;广西大学自然科学基金:换热管内液轮机工作特性研究

摘　　要：对Ф42mm换热管插入扭带后的阻力特性和传热特性进行了分析，发现插入扭带以后，传热系数和流动阻力均增加，并且二者均随扭带的带宽增大而增大；通过非线性回归分析，得到插入铝制扭带后换热管摩擦阻力系数关联式和给热系数关联式；对插入扭带的换热管进行了强化传热性能评价分析，传热性能评价因子的数值在1．09～1．44范围之间，研究的扭带均具有强化传热的应用价值。The resistance and beat transfer properties of 642 tube with in-tube twisted tape were analyzed. It has been found that with in-tube twisted tape, both heat transfer coefficient and floating resistance are increased, and both are increased with the increase of the tape width. By non-linear regression, the correlation equations for friction resistance coefficient and heat transfer coefficient used for heat transfer tubes with in-tube twisted tape were obtained. The intensified heat transfer characteristic of this kind of tube was analyzed and assessed. The beat transfer assessment factor is in the scope of 1.09 - 1.44. Thus, all of the twisted tapes have the effect of heat transfer intensification.

关 键 词：铝制扭带 强化传热 非线性回归 阻力特性 

分 类 号：TQ051.5[化学工程]