换热管内置螺旋形扭带阻力与传热特性的实验研究  

Experimental studies on resistance and heat transfer characteristics of heat transfer tube fitted with helically twisted tape

作　　者：欧向波 林清宇[1] 冯振飞[1] 刘晓林[1] 刘宜仔 

机构地区：[1]广西大学化学化工学院广西石化资源加工及过程强化技术重点实验室,广西南宁530004

出　　处：《化工科技》2013年第6期5-9,共5页Science & Technology in Chemical Industry

基　　金：国家自然科学基金资助项目(29966001);广西自然科学基金项目(桂科青0447005);广西大学基金项目

摘　　要：为了研究螺旋形扭带阻力与传热特性,选取了不同宽度（6、7和8 mm）的3种扭率（2.0、3.0、4.0）、3种螺距比（1.5、2.0、2.5）的参数组合下共27根螺旋形扭带插入换热管内进行实验.实验结果表明,插入螺旋形扭带后换热管内流动阻力和传热效果都有明显提高.通过对实验数据的多元线性回归分析,建立了相应的阻力系数和努赛尔数关联式.并且由强化传热综合性能评价分析,在实验雷诺数范围内得出强化传热综合性能评价因子φ=1.063～1.587,证明了实验研究的扭带具有强化传热的应用价值.Abstract： This paper reported an experimental study on friction resistance and heat transfer character- istics in a heat transfer tube equipped with 27 helically twisted tapes consisted of different width pa- rameter （6,7 and 8 mm）, three twist ratios parameter （2,3,4）and three helical pitch ratios parameter （1.5,2,2.5）. The experimental results have shown that the friction resistance and heat transfer effect of heat transfer tubes have a marked improvement after fitted with helically twisted tape. The resist- ance coefficient equation and Nusselt number equation were established by analyzing the experimental data with Multiple Linear Regression Analysis. In the Reynolds number present range of this experi- mental study,the comprehensive performance evaluation of heat transfer factor q0= 1. 063 - 1. 587 was observed by comprehensively estimating and analysis, and it indicated that the heat transfer en- hancement of helically twisted tape is good.

关 键 词：传热特性 螺旋形扭带 阻力 换热管 

分 类 号：TQ051.5[化学工程]