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Experimental study of pressure drop and heat transfer in a U bend channel with various guide vanes and ribs

Cimina, Susanna; Wang, Chenglong LU ; Wang, Lei LU ; Niro, Alfonso and Sundén, Bengt LU (2015) In Journal of Enhanced Heat Transfer 22(1). p.29-45
Abstract
An experimental study was conducted to investigate pressure drop and heat transfer in a U-bend section with various configurations of guide vanes and two kinds of rib shapes on the outer wall. Ten guide vane types were tested. Results highlight that the use of special guide vanes can reduce the pressure drop penalty up to a maximum of 31%. However, guide vanes are usually associated with heat transfer reduction. To further enhance heat transfer, transverse and V-shaped ribs were attached on the outer wall. Thermal performance evaluation showed that the 45 degrees V-shaped downstream-pointing ribs coupled with guide vane configuration 5 give the best thermal performance. The results of this study can be employed to improve the internal... (More)
An experimental study was conducted to investigate pressure drop and heat transfer in a U-bend section with various configurations of guide vanes and two kinds of rib shapes on the outer wall. Ten guide vane types were tested. Results highlight that the use of special guide vanes can reduce the pressure drop penalty up to a maximum of 31%. However, guide vanes are usually associated with heat transfer reduction. To further enhance heat transfer, transverse and V-shaped ribs were attached on the outer wall. Thermal performance evaluation showed that the 45 degrees V-shaped downstream-pointing ribs coupled with guide vane configuration 5 give the best thermal performance. The results of this study can be employed to improve the internal design of modern gas turbine blade cooling systems. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
rough surfaces, structured roughness, single-phase flow, bend duct, geometry, guide vanes, liquid crystal thermography
in
Journal of Enhanced Heat Transfer
volume
22
issue
1
pages
29 - 45
publisher
Begell House
external identifiers
  • wos:000367104400002
  • scopus:84950312837
ISSN
1563-5074
DOI
10.1615/JEnhHeatTransf.2015013382
language
English
LU publication?
yes
id
f5eabc52-3bc4-428a-8748-b4fb9c2f6b8d (old id 8548760)
date added to LUP
2016-01-29 08:57:15
date last changed
2017-04-09 03:01:02
@article{f5eabc52-3bc4-428a-8748-b4fb9c2f6b8d,
  abstract     = {An experimental study was conducted to investigate pressure drop and heat transfer in a U-bend section with various configurations of guide vanes and two kinds of rib shapes on the outer wall. Ten guide vane types were tested. Results highlight that the use of special guide vanes can reduce the pressure drop penalty up to a maximum of 31%. However, guide vanes are usually associated with heat transfer reduction. To further enhance heat transfer, transverse and V-shaped ribs were attached on the outer wall. Thermal performance evaluation showed that the 45 degrees V-shaped downstream-pointing ribs coupled with guide vane configuration 5 give the best thermal performance. The results of this study can be employed to improve the internal design of modern gas turbine blade cooling systems.},
  author       = {Cimina, Susanna and Wang, Chenglong and Wang, Lei and Niro, Alfonso and Sundén, Bengt},
  issn         = {1563-5074},
  keyword      = {rough surfaces,structured roughness,single-phase flow,bend duct,geometry,guide vanes,liquid crystal thermography},
  language     = {eng},
  number       = {1},
  pages        = {29--45},
  publisher    = {Begell House},
  series       = {Journal of Enhanced Heat Transfer},
  title        = {Experimental study of pressure drop and heat transfer in a U bend channel with various guide vanes and ribs},
  url          = {http://dx.doi.org/10.1615/JEnhHeatTransf.2015013382},
  volume       = {22},
  year         = {2015},
}