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Flow structure and heat transfer characteristics of a 90°-turned pin-finned wedge duct with dimples at different locations

Luo, Lei; Du, Wei; Wang, Songtao; Sunden, Bengt LU and Zhang, Xinghong (2018) In Numerical Heat Transfer; Part A: Applications 73(3). p.143-162
Abstract

In this study, numerical simulations are performed to investigate the effect of dimple location on the flow structure and heat transfer characteristics in a 90°-turned channel with pin fins. Results of the flow structure, heat transfer on the endwall, and friction factor are included in this study. It is found that the dimple location has an impact on the flow structure and heat transfer both for the pin fins arranged with in-line and staggered layout. The horseshoe vortex near the pin fin is influenced by the location of the dimple. The dimple enhances the Nusselt number on the endwall surface significantly. In addition, the dimple location has an effect on the low-speed recirculation, impingement, and vortex which are generated by the... (More)

In this study, numerical simulations are performed to investigate the effect of dimple location on the flow structure and heat transfer characteristics in a 90°-turned channel with pin fins. Results of the flow structure, heat transfer on the endwall, and friction factor are included in this study. It is found that the dimple location has an impact on the flow structure and heat transfer both for the pin fins arranged with in-line and staggered layout. The horseshoe vortex near the pin fin is influenced by the location of the dimple. The dimple enhances the Nusselt number on the endwall surface significantly. In addition, the dimple location has an effect on the low-speed recirculation, impingement, and vortex which are generated by the dimple. However, the dimple has very limited effects on the friction factor for all cases. It is also found that the area goodness factor and volume goodness factor are improved by the dimple.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Numerical Heat Transfer; Part A: Applications
volume
73
issue
3
pages
20 pages
publisher
Taylor & Francis
external identifiers
  • scopus:85041121572
ISSN
1040-7782
DOI
10.1080/10407782.2017.1421373
language
English
LU publication?
yes
id
7e9957bd-9607-48af-96e2-ebbdbbc66ea6
date added to LUP
2018-02-23 09:28:02
date last changed
2018-05-29 09:41:04
@article{7e9957bd-9607-48af-96e2-ebbdbbc66ea6,
  abstract     = {<p>In this study, numerical simulations are performed to investigate the effect of dimple location on the flow structure and heat transfer characteristics in a 90°-turned channel with pin fins. Results of the flow structure, heat transfer on the endwall, and friction factor are included in this study. It is found that the dimple location has an impact on the flow structure and heat transfer both for the pin fins arranged with in-line and staggered layout. The horseshoe vortex near the pin fin is influenced by the location of the dimple. The dimple enhances the Nusselt number on the endwall surface significantly. In addition, the dimple location has an effect on the low-speed recirculation, impingement, and vortex which are generated by the dimple. However, the dimple has very limited effects on the friction factor for all cases. It is also found that the area goodness factor and volume goodness factor are improved by the dimple.</p>},
  author       = {Luo, Lei and Du, Wei and Wang, Songtao and Sunden, Bengt and Zhang, Xinghong},
  issn         = {1040-7782},
  language     = {eng},
  month        = {02},
  number       = {3},
  pages        = {143--162},
  publisher    = {Taylor & Francis},
  series       = {Numerical Heat Transfer; Part A: Applications},
  title        = {Flow structure and heat transfer characteristics of a 90°-turned pin-finned wedge duct with dimples at different locations},
  url          = {http://dx.doi.org/10.1080/10407782.2017.1421373},
  volume       = {73},
  year         = {2018},
}