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Numerical simulation and field synergy analysis of heat transfer performance of radial slit fin surface
Zhou Junjie 1,Wu Zhigen 1,Tao Wenquan 2 *
1.School of Energy & Power Engineering,Xi’an Jiaotong University
2.School of Energy & Power Engineering-Xi’an Jiaotong University
*Correspondence author
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Funding: 教育部博士点基金（No.20030698015）
Opened online:18 October 2006
Accepted by: none
Citation: Zhou Junjie ,Wu Zhigen ,Tao Wenquan .Numerical simulation and field synergy analysis of heat transfer performance of radial slit fin surface[OL]. [18 October 2006] http://en.paper.edu.cn/en_releasepaper/content/8804
 
 
In this paper, the finite volume method is used to numerically simulate the laminar heat transfer performance of a plate fin-and-tube heat exchanger surface with radially positioned slots. The problem is of conjugated type in that the fin temperature distribution is determined during the computation process. The heat transfer performance of a plain plate fin-and-tube surface is also computed for comparison. Computations are performed at the different frontal velocity, ranging from 1 m/s to 3 m/s under three constraints: identical mass flow rate, identical pressure drop and identical pumping power. It is found that the Nusselt number and the friction factor of the two types of plate fin surfaces can be well correlated by power law equation. At the identical pumping power or the identical pressure drop the performance of the slotted fin surface is much better than that of the plain fin surface, while under the identical mass flow rate, the performance of the slotted fin is inferior to that of the plain plate fin. The field synergy principle is applied to reveal the difference of synergy between the velocity and temperature gradient for the two types of plate fin surfaces, and it is found that where there is an enhanced heat transfer there is a better synergy between velocity and the fluid temperature gradient
Keywords:Numerical simulation Field synergy principle Plain plate fin Radial slit fin Heat transfer performance Identical pumping power Identical pressure drop Identical mass flow
 
 
 

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