Advanced

Experimental investigation of local heat transfer in a square duct with various-shaped ribs

Wang, Lei LU and Sundén, Bengt LU (2007) In Heat and Mass Transfer 43(8). p.759-766
Abstract
In the present study, experimental studies are carried out to investigate the heat transfer and friction characteristics in a square duct roughened by various-shaped ribs on one wall. The ribs are oriented transversely to the main stream in a periodic arrangement. Liquid crystal thermography is employed to measure the local and average heat transfer coefficient on the ribbed surface. The rib height-to-duct hydraulic diameter ratio is fixed at 0.1; the rib pitch-to-height ratio varies from 8 to 15 and the test Reynolds number spans from 8,000 to 20,000. The results show that the trapezoidal-shaped ribs with decreasing height in the flow direction (case C) provide the highest heat transfer enhancement factor and are likely to be used to... (More)
In the present study, experimental studies are carried out to investigate the heat transfer and friction characteristics in a square duct roughened by various-shaped ribs on one wall. The ribs are oriented transversely to the main stream in a periodic arrangement. Liquid crystal thermography is employed to measure the local and average heat transfer coefficient on the ribbed surface. The rib height-to-duct hydraulic diameter ratio is fixed at 0.1; the rib pitch-to-height ratio varies from 8 to 15 and the test Reynolds number spans from 8,000 to 20,000. The results show that the trapezoidal-shaped ribs with decreasing height in the flow direction (case C) provide the highest heat transfer enhancement factor and are likely to be used to suppress the local hot spot which usually occurs in the region just behind the ribs. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Heat and Mass Transfer
volume
43
issue
8
pages
759 - 766
publisher
Springer
external identifiers
  • wos:000246097500005
  • scopus:34247578708
ISSN
1432-1181
DOI
10.1007/s00231-006-0190-y
language
English
LU publication?
yes
id
ffe0b67d-ac41-46f3-8bab-51ac0ca16b14 (old id 666447)
date added to LUP
2007-12-19 10:38:39
date last changed
2017-08-20 03:44:24
@article{ffe0b67d-ac41-46f3-8bab-51ac0ca16b14,
  abstract     = {In the present study, experimental studies are carried out to investigate the heat transfer and friction characteristics in a square duct roughened by various-shaped ribs on one wall. The ribs are oriented transversely to the main stream in a periodic arrangement. Liquid crystal thermography is employed to measure the local and average heat transfer coefficient on the ribbed surface. The rib height-to-duct hydraulic diameter ratio is fixed at 0.1; the rib pitch-to-height ratio varies from 8 to 15 and the test Reynolds number spans from 8,000 to 20,000. The results show that the trapezoidal-shaped ribs with decreasing height in the flow direction (case C) provide the highest heat transfer enhancement factor and are likely to be used to suppress the local hot spot which usually occurs in the region just behind the ribs.},
  author       = {Wang, Lei and Sundén, Bengt},
  issn         = {1432-1181},
  language     = {eng},
  number       = {8},
  pages        = {759--766},
  publisher    = {Springer},
  series       = {Heat and Mass Transfer},
  title        = {Experimental investigation of local heat transfer in a square duct with various-shaped ribs},
  url          = {http://dx.doi.org/10.1007/s00231-006-0190-y},
  volume       = {43},
  year         = {2007},
}