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Heat transfer and flow structure in a rotating duct with detached pin fins

Du, Wei LU ; Luo, Lei ; Wang, Songtao ; Liu, Jian LU and Sunden, Bengt LU (2019) In Numerical Heat Transfer; Part A: Applications 75(4). p.217-241
Abstract


The realizable k - ε turbulence model was used to calculate flow and heat transfer characteristics in a rotating rectangular duct with detached pin fins in staggered arrangement. Transverse and longitudinal spacings of the pin fins were S
1
= 2.5 D and S
2
= 2.5 D, respectively. Reynolds number was 7,000 and Rotation number (Ro) varied from 0 to 1 while the clearance ranged from 0 to 0.5. Streamlines, vortex... (More)


The realizable k - ε turbulence model was used to calculate flow and heat transfer characteristics in a rotating rectangular duct with detached pin fins in staggered arrangement. Transverse and longitudinal spacings of the pin fins were S
1
= 2.5 D and S
2
= 2.5 D, respectively. Reynolds number was 7,000 and Rotation number (Ro) varied from 0 to 1 while the clearance ranged from 0 to 0.5. Streamlines, vortex structure, wall shear stresses and Nusselt numbers were obtained. Flow phenomenon at the pin fin rear side and a leakage vortex near the pin fin tip were observed. High Nusselt numbers appeared on leading side. The leakage vortex imposed high energy losses in the mainflow. The flow and heat transfer characteristics were associated with Ro number and clearance. Middle values of Ro and clearance induced highest Nusselt numbers on leading side. However, high Ro and small clearance gave highest Nusselt numbers on trailing side.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Numerical Heat Transfer; Part A: Applications
volume
75
issue
4
pages
25 pages
publisher
Taylor & Francis
external identifiers
  • scopus:85063628181
ISSN
1040-7782
DOI
10.1080/10407782.2019.1580957
language
English
LU publication?
yes
id
149daf74-8311-4b3a-a814-d0be182847af
date added to LUP
2019-04-10 12:34:21
date last changed
2020-03-24 06:46:12
@article{149daf74-8311-4b3a-a814-d0be182847af,
  abstract     = {<p><br>
                                                         The realizable  k - ε  turbulence model was used to calculate flow and heat transfer characteristics in a rotating rectangular duct with detached pin fins in staggered arrangement. Transverse and longitudinal spacings of the pin fins were S                             <br>
                            <sub>1</sub><br>
                                                          = 2.5 D and S                             <br>
                            <sub>2</sub><br>
                                                          = 2.5 D, respectively. Reynolds number was 7,000 and Rotation number (Ro) varied from 0 to 1 while the clearance ranged from 0 to 0.5. Streamlines, vortex structure, wall shear stresses and Nusselt numbers were obtained. Flow phenomenon at the pin fin rear side and a leakage vortex near the pin fin tip were observed. High Nusselt numbers appeared on leading side. The leakage vortex imposed high energy losses in the mainflow. The flow and heat transfer characteristics were associated with Ro number and clearance. Middle values of Ro and clearance induced highest Nusselt numbers on leading side. However, high Ro and small clearance gave highest Nusselt numbers on trailing side.                         <br>
                        </p>},
  author       = {Du, Wei and Luo, Lei and Wang, Songtao and Liu, Jian and Sunden, Bengt},
  issn         = {1040-7782},
  language     = {eng},
  number       = {4},
  pages        = {217--241},
  publisher    = {Taylor & Francis},
  series       = {Numerical Heat Transfer; Part A: Applications},
  title        = {Heat transfer and flow structure in a rotating duct with detached pin fins},
  url          = {http://dx.doi.org/10.1080/10407782.2019.1580957},
  doi          = {10.1080/10407782.2019.1580957},
  volume       = {75},
  year         = {2019},
}