Transversal tube pitch effects on local heat
transfer characteristics of the flat tube bank fin mounted vortex
generators and their sensitivity to nonuniform temperature of the
fin

doi:10.1007/s11708-009-0061-6

Front. Energy

2010, Vol. 4

Issue (3) : 333-345 https://doi.org/10.1007/s11708-009-0061-6

Research articles

Transversal tube pitch effects on local heat transfer characteristics of the flat tube bank fin mounted vortex generators and their sensitivity to nonuniform temperature of the fin

Liangbi WANG,Zhimin LIN,Kangjie SUN,Yuanxin DONG,Song LIU,Yongheng ZHANG,

Department of Mechanical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China;

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Abstract The tube bank fin is commonly used to increase the area of the heat transfer surface with a small heat transfer coefficient of a heat exchanger. If vortex generators (VGs) are punched on the fin surface, the heat transfer performance of the fin can be improved. This paper focused on the effect of transversal tube pitch on the local heat transfer performance of the three-row flat tube bank fin mounted with VGs. On the fin surface, constructing the flow channel but without mounted VGs, the transversal tube pitch was greater, and the span averaged Nusselt number downstream was larger because fewer interactions of vortices would be generated from different VGs located upstream. When the area goodness factor was used as the criteria on the condition of one tube unit of heat exchanger for commonly used fin materials and fin thickness, the transversal tube pitch has considerable effect on the heat transfer enhancement of VGs. Large transversal tube pitch is more sensitive to fin material than to fin thickness.

Keywords heat transfer enhancement vortex generator finned flat tube bank heat exchanger

Issue Date: 05 September 2010

Cite this article:

Song LIU,Liangbi WANG,Kangjie SUN, et al. Transversal tube pitch effects on local heat transfer characteristics of the flat tube bank fin mounted vortex generators and their sensitivity to nonuniform temperature of the fin[J]. Front. Energy, 2010, 4(3): 333-345.

URL:

https://academic.hep.com.cn/fie/EN/10.1007/s11708-009-0061-6
https://academic.hep.com.cn/fie/EN/Y2010/V4/I3/333

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