Доступ предоставлен для: Guest
Портал Begell Электронная Бибилиотека e-Книги Журналы Справочники и Сборники статей Коллекции
Journal of Enhanced Heat Transfer
Импакт фактор: 1.406 5-летний Импакт фактор: 1.075 SJR: 0.287 SNIP: 0.653 CiteScore™: 1.2

ISSN Печать: 1065-5131
ISSN Онлайн: 1563-5074

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

Краткое описание

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
Numerical Investigations on Enhancement of Heat Transfer in a Compact Fin-and-Tube Heat Exchanger Using Delta Winglet Type Vortex Generators
Journal of Enhanced Heat Transfer, Vol.6, 1999, issue 1
A. A. Bastani Jahromi, Gautam Biswas, Nimai K. Mitra
HEAT TRANSFER IN SQUARE CHANNELS WITH WEDGE-SHAPED AND DELTA-SHAPED TURBULENCE PROMOTERS
Journal of Enhanced Heat Transfer, Vol.24, 2017, issue 1-6
Je-Chin Han, J. Joy Huang, Ching-Pang Lee
NUMERICAL SIMULATION OF CONVECTIVE HEAT TRANSFER AND PRESSURE DROP IN TWO TYPES OF LONGITUDINALLY AND INTERNALLY FINNED TUBES
Heat Transfer Research, Vol.46, 2015, issue 1
Feng Wu, Wenjing Zhou
CONVERGENCE ANGLES EFFECT ON HEAT TRANSFER CHARACTERISTICS IN A WEDGED DUCT WITH DIMPLES/PROTRUSIONS
Heat Transfer Research, Vol.48, 2017, issue 14
Lei Luo, Songtao Wang, Wei Du, Zhiqi Zhao, Fengbo Wen