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An experimental investigation of heat transfer and fluid flow in a rectangular duct with broken V-shaped ribs

Wang, Lieke LU and Sundén, Bengt LU (2004) In Experimental Heat Transfer 17(4). p.243-259
Abstract
An experimental investigation of heat transfer and fluid flow in a rectangular duct roughened by broken V-shaped ribs pointing upstream was carried out. The rectangular duct had art aspect ratio of 1/8, and the Reynolds number range was from 1000 to 6000. Liquid Crystal Thermography (LCT) was used to obtain the detailed heat transfer distributions on the ribbed wall. The main observed characteristics include spanwise variation, local maxima, and saw-tooth fashion along the streamwise direction. These features were correlated and explained by the detailed velocity structures, observed by Particle Image Velocimetry (PIV). The flow characteristics introduced by ribs include altered spanwise profile of the mean flow velocity, a complicated... (More)
An experimental investigation of heat transfer and fluid flow in a rectangular duct roughened by broken V-shaped ribs pointing upstream was carried out. The rectangular duct had art aspect ratio of 1/8, and the Reynolds number range was from 1000 to 6000. Liquid Crystal Thermography (LCT) was used to obtain the detailed heat transfer distributions on the ribbed wall. The main observed characteristics include spanwise variation, local maxima, and saw-tooth fashion along the streamwise direction. These features were correlated and explained by the detailed velocity structures, observed by Particle Image Velocimetry (PIV). The flow characteristics introduced by ribs include altered spanwise profile of the mean flow velocity, a complicated secondary flow over the cross section, and flow separation and reattachment along the streamwise direction. In addition, a comparison of overall thermal and hydraulic performance with previously tested continuous ribs was conducted It was found that the broken ribs had better overall performance in the high Reynolds number range. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Experimental Heat Transfer
volume
17
issue
4
pages
243 - 259
publisher
Taylor & Francis
external identifiers
  • wos:000223999900001
  • scopus:4544238309
ISSN
0891-6152
DOI
10.1080/08916150490487611
language
English
LU publication?
yes
id
c9d6ffa2-615c-4b5b-a017-86407bd2f82c (old id 267143)
date added to LUP
2007-11-05 10:20:56
date last changed
2017-08-27 03:54:53
@article{c9d6ffa2-615c-4b5b-a017-86407bd2f82c,
  abstract     = {An experimental investigation of heat transfer and fluid flow in a rectangular duct roughened by broken V-shaped ribs pointing upstream was carried out. The rectangular duct had art aspect ratio of 1/8, and the Reynolds number range was from 1000 to 6000. Liquid Crystal Thermography (LCT) was used to obtain the detailed heat transfer distributions on the ribbed wall. The main observed characteristics include spanwise variation, local maxima, and saw-tooth fashion along the streamwise direction. These features were correlated and explained by the detailed velocity structures, observed by Particle Image Velocimetry (PIV). The flow characteristics introduced by ribs include altered spanwise profile of the mean flow velocity, a complicated secondary flow over the cross section, and flow separation and reattachment along the streamwise direction. In addition, a comparison of overall thermal and hydraulic performance with previously tested continuous ribs was conducted It was found that the broken ribs had better overall performance in the high Reynolds number range.},
  author       = {Wang, Lieke and Sundén, Bengt},
  issn         = {0891-6152},
  language     = {eng},
  number       = {4},
  pages        = {243--259},
  publisher    = {Taylor & Francis},
  series       = {Experimental Heat Transfer},
  title        = {An experimental investigation of heat transfer and fluid flow in a rectangular duct with broken V-shaped ribs},
  url          = {http://dx.doi.org/10.1080/08916150490487611},
  volume       = {17},
  year         = {2004},
}