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单片矩形翅片表面的换热系数分布
引用本文:王厚华 杨延萍. 单片矩形翅片表面的换热系数分布[J]. 土木与环境工程学报, 1998, 20(5): 57-60
作者姓名:王厚华 杨延萍
作者单位:重庆建筑大学城市建设学院!400045
摘    要:矩形翅片广泛应用于各类换热器,翅片表面的换热系数分布是强化传热研究中的问题之一。采用单片矩形翅片管作为模型,用有限差分法在翅片表面划分节点,通过实验测量获得气流速度u=4.5m/s时各节点处离散的表面温度分布及气流温度分布,最后利用导热反问题方法求得各节点换热系数。经热平衡法验证,所获得的解能正确反映实际换换热情况。

关 键 词:翅片 换热系数 强化传热 换热器

Convection Heat Transfer Coefficient Distribution Over the Single Rectangle Fin Surface
Wang Houhu,Yang Yanping,Jiang Chun. Convection Heat Transfer Coefficient Distribution Over the Single Rectangle Fin Surface[J]. Journal of Civil and Environmental Engineering, 1998, 20(5): 57-60
Authors:Wang Houhu  Yang Yanping  Jiang Chun
Abstract:Rectangle fin is widely used in different kinds of heat exchangrs. Convection heat transfercoefficient distribution over the fin surface is one of the theorehcal problems in research on enhancement of heat transfer. In this paper, a tube with an attached rectangular fin is used for a model and thefin surface is divided into a network of nodes by the finite difference techinque. When the wind velocityis u= 4. 5 m/s. the temperature distribution of discretization is obtained by experimental measurement,then the convection heat transfer coefficient of all nodes are soved by using the methed of inverse heatconduction problem. Through checking with heat balance methed, the results show that the solution cancorrectly express the actual heat transfer situation.This result is useful to experimental research onenhancement of heat transfer for finned for heat exchangers.
Keywords:fin   convection heat transfer coefficient   enhancement of heat transfer
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