化工学报2013，Vol.64Issue(7)：2405-2410,6.DOI:10.3969/j.issn.0438-1157.2013.07.014
封闭空间内纵向外翅片管结构参数对传热的影响
Heat transfer characteristic of longitudinal externally-finned tube in closed space
摘要
Abstract
A three-dimensional numerical study was carried out to investigate effects of fin angle,fin length,and tube wall temperature in natural convection on heat transfer enhancement for a longitudinal externally-finned tube placed vertically in a closed space.The numerical results show that the heat transfer rate per unit mass increases with fin length.The maximum heat transfer rate per unit mass occurs when the fin angle is about 60° for all the fin angles investigated.With increasing tube wall temperature,the maximum ratio of the natural convection occurs in the temperature range studied.In order to consider the effect of fin angle on heat transfer enhancement,the dimensionless factor d/H is introduced.The natural convection heat transfer criterion of longitudinal externally-finned tube in vertical is fitted based on 65 computational cases and the mean error is 3.53％ between the criterion and simulations.关键词
翅片管/自然对流/结构优化/强化传热Key words
finned tube/ natural convection/ structure optimum/ heat transfer enhancement分类
能源科技引用本文复制引用
邱燕,田茂诚,冷学礼..封闭空间内纵向外翅片管结构参数对传热的影响[J].化工学报,2013,64(7):2405-2410,6.基金项目
国家重点基础研究发展计划项目(2007CB206903) （2007CB206903）
山东省科技攻关项目(2008GG10007009) （2008GG10007009）
supported by the National Basic Research Program of China (2007CB206903) and the Science and Technology Project of Shandong Province (2008GG10007009). （2007CB206903）
