Inscrição na biblioteca: Guest
Portal Digital Begell Biblioteca digital da Begell eBooks Diários Referências e Anais Coleções de pesquisa
Journal of Enhanced Heat Transfer
Fator do impacto: 1.406 FI de cinco anos: 1.075 SJR: 0.287 SNIP: 0.653 CiteScore™: 1.2

ISSN Imprimir: 1065-5131
ISSN On-line: 1563-5074

Volumes:
Volume 27, 2020 Volume 26, 2019 Volume 25, 2018 Volume 24, 2017 Volume 23, 2016 Volume 22, 2015 Volume 21, 2014 Volume 20, 2013 Volume 19, 2012 Volume 18, 2011 Volume 17, 2010 Volume 16, 2009 Volume 15, 2008 Volume 14, 2007 Volume 13, 2006 Volume 12, 2005 Volume 11, 2004 Volume 10, 2003 Volume 9, 2002 Volume 8, 2001 Volume 7, 2000 Volume 6, 1999 Volume 5, 1998 Volume 4, 1997 Volume 3, 1996 Volume 2, 1995 Volume 1, 1994

Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.2011003032
pages 361-374

NUMERICAL SIMULATION ON TURBULENT FLUID FLOW AND HEAT TRANSFER ENHANCEMENT OF A TUBE BANK FIN HEAT EXCHANGER WITH MOUNTED VORTEX GENERATORS ON THE FINS

Wan-Ling Hu
School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou, 730070, China; Key Laboratory of Railway Vehicle Thermal Engineering (Lanzhou Jiaotong University), Ministry of Education of China, Lanzhou, 730070, China
Yong-Heng Zhang
Key Laboratory of Railway Vehicle Thermal Engineering (Lanzhou Jiaotong University) Ministry of Education, Lanzhou, 730070 P. R. China;Department of Mechanical Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu 730070 P. R. China
Liang-Bi Wang
School of Mechanical Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu 730070, PR China; Key Laboratory of Railway Vehicle Thermal Engineering of MOE, Lanzhou Jiaotong University, Lanzhou, Gansu 730070, PR China

RESUMO

Three-dimensional turbulent flow and heat transfer enhancement in the channel formed by staggered tube bank fin heat exchangers with vortex generators (VGs) were studied using a numerical method. Numerical calculations were performed in the range of Reynolds number from 3000 to 20,000. The average Nusselt number and the corresponding friction factor obtained from the numerical study were compared with those obtained from naphthalene sublimation heat/mass analogy experiments in order to validate the numerical method. It was found that the average Nusselt number for the four-row tube bank fin channel mounted with VGs increased by 30.9−47.7% over its counterpart without VGs, and the corresponding friction factor increased by 56.0−66.3%. The local Nusselt number distribution reveals that when VGs are mounted on one fin surface, they can efficiently enhance the heat transfer in the region behind the tube on both fin surfaces. The average Nusselt number increases with increasing the angle of attack θ. However, if the angle of attack is too large, the vortex may break down and decrease heat transfer enhancement. The optimum attack angle for heat transfer augmentation is about θ = 45 deg. Both the average Nu and friction factor decrease with an increase in the tube row numbers. When the Reynolds number is less than 9000, two tube rows are recommended, and when the Re is higher than 9000, the number of tube rows has a small effect on heat transfer performance.


Articles with similar content:

THE EXPERIMENTAL STUDY OF HEAT TRANSFER ENHANCEMENT AND PRESSURE DROP CHARACTERISTICS WITH WING-TYPE VORTEX GENERATORS FOR STAGGERED CIRCULAR TUBE BANK FIN COMPACT HEAT EXCHANGER
Proceedings of Symposium on Energy Engineering in the 21st Century (SEE2000) Volume I-IV, Vol.0, 2000, issue
Y. Qiu , Y. X. Dong , Liang-Bi Wang, Y. G. Mei , Y. H. Zhang
EFFECTS OF THE INTERACTION OF LONGITUDINAL VORTICES ON THE FLOW FIELD AND HEAT TRANSFER OVER A FLAT-TUBE-AND-FIN HEAT EXCHANGER
Journal of Enhanced Heat Transfer, Vol.21, 2014, issue 6
KeWei Song, Liang-Bi Wang
Numerical Prediction of the Performances of the Fins with Punched Delta Winglets and the Louver Fins and Their Comparison
Journal of Enhanced Heat Transfer, Vol.12, 2005, issue 4
Jingchun Min, Wei Xu
NUMERICAL STUDY ON HEAT TRANSFER ENHANCEMENT AND FLOW STRUCTURE IN A TUBE WITH CENTRAL SLANT DEFLECTOR
International Heat Transfer Conference 16, Vol.14, 2018, issue
Peng Liu, Zhichun Liu, Jinyi Lv, Wei Liu
Thermal performance of double pipe heat exchanger with V-cut twisted Tape inserts
Proceedings of the 25th National and 3rd International ISHMT-ASTFE Heat and Mass Transfer Conference (IHMTC-2019), Vol.0, 2019, issue
Jahar Sarkar, Sumit Kr. Singh