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Effects of deposition locations on film cooling with and without a mist injection

Wang, Jin; Cui, Pei; Sundén, Bengt LU and Yang, Ran (2016) In Numerical Heat Transfer; Part A: Applications 70(10). p.1072-1086
Abstract

The adiabatic film-cooling effectiveness on a thermal barrier coating surface is investigated numerically. A film-cooling hole with an inclination angle of 35° is placed upstream the deposition configuration. The depositions are arranged on the external wall with three different positions. For no-mist models, the cooling performances downstream the wall are investigated for the blowing ratios of 0.5, 0.75, and 1.0. Results show that the adiabatic film-cooling effectiveness without surface deposition is decreased by increasing the blowing ratio. To investigate the effects of both different locations and 4.4% mist injection on the film cooling, a discrete phase model (DPM) is used. It is found that the film-cooling effectiveness is... (More)

The adiabatic film-cooling effectiveness on a thermal barrier coating surface is investigated numerically. A film-cooling hole with an inclination angle of 35° is placed upstream the deposition configuration. The depositions are arranged on the external wall with three different positions. For no-mist models, the cooling performances downstream the wall are investigated for the blowing ratios of 0.5, 0.75, and 1.0. Results show that the adiabatic film-cooling effectiveness without surface deposition is decreased by increasing the blowing ratio. To investigate the effects of both different locations and 4.4% mist injection on the film cooling, a discrete phase model (DPM) is used. It is found that the film-cooling effectiveness is improved remarkably from the deposition position to the wall downstream. In addition, deposition formation at the middle location shows a good cooling effectiveness, but the lowest value of the film-cooling effectiveness occurs upstream the deposition position.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Numerical Heat Transfer; Part A: Applications
volume
70
issue
10
pages
15 pages
publisher
Taylor & Francis
external identifiers
  • scopus:84992073964
  • wos:000388424600002
ISSN
1040-7782
DOI
10.1080/10407782.2016.1230395
language
English
LU publication?
yes
id
b6f21777-fc14-4e59-ad43-6dd13c7f52f6
date added to LUP
2016-11-09 09:19:57
date last changed
2017-10-29 04:53:49
@article{b6f21777-fc14-4e59-ad43-6dd13c7f52f6,
  abstract     = {<p>The adiabatic film-cooling effectiveness on a thermal barrier coating surface is investigated numerically. A film-cooling hole with an inclination angle of 35° is placed upstream the deposition configuration. The depositions are arranged on the external wall with three different positions. For no-mist models, the cooling performances downstream the wall are investigated for the blowing ratios of 0.5, 0.75, and 1.0. Results show that the adiabatic film-cooling effectiveness without surface deposition is decreased by increasing the blowing ratio. To investigate the effects of both different locations and 4.4% mist injection on the film cooling, a discrete phase model (DPM) is used. It is found that the film-cooling effectiveness is improved remarkably from the deposition position to the wall downstream. In addition, deposition formation at the middle location shows a good cooling effectiveness, but the lowest value of the film-cooling effectiveness occurs upstream the deposition position.</p>},
  author       = {Wang, Jin and Cui, Pei and Sundén, Bengt and Yang, Ran},
  issn         = {1040-7782},
  language     = {eng},
  number       = {10},
  pages        = {1072--1086},
  publisher    = {Taylor & Francis},
  series       = {Numerical Heat Transfer; Part A: Applications},
  title        = {Effects of deposition locations on film cooling with and without a mist injection},
  url          = {http://dx.doi.org/10.1080/10407782.2016.1230395},
  volume       = {70},
  year         = {2016},
}