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Effects of deposition height and width on film cooling

Wang, Jin; Cui, Pei; Sundén, Bengt LU and Vujanović, Milan (2016) In Numerical Heat Transfer; Part A: Applications 70(6). p.673-687
Abstract

Because natural gas resources continue to be depleted for usage of gas turbines, it becomes important to search for alternate fuels. Coal-derived synthetic fuels contain traces of ash and other contaminants that result in deposition on vane and turbine surfaces. The present research shows a comparison of simulated results with and without a deposition configuration. Film cooling effectiveness distribution after the deposition was obtained to investigate the effects of various deposition heights and widths under the blowing ratios of 0.5, 0.75, and 1.0. The results indicated that the deposition near the hole exit can weaken the cooling performance. Moreover, it is revealed that the film cooling effectiveness deteriorates with increased... (More)

Because natural gas resources continue to be depleted for usage of gas turbines, it becomes important to search for alternate fuels. Coal-derived synthetic fuels contain traces of ash and other contaminants that result in deposition on vane and turbine surfaces. The present research shows a comparison of simulated results with and without a deposition configuration. Film cooling effectiveness distribution after the deposition was obtained to investigate the effects of various deposition heights and widths under the blowing ratios of 0.5, 0.75, and 1.0. The results indicated that the deposition near the hole exit can weaken the cooling performance. Moreover, it is revealed that the film cooling effectiveness deteriorates with increased deposition heights. The deposition width study revealed that a narrow deposition shows a good attachment of the coolant jet to the wall surface. It is found that an improvement of the film cooling effectiveness can be obtained by decreasing the blowing ratio.

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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
6
pages
15 pages
publisher
Taylor & Francis
external identifiers
  • scopus:84982255582
  • wos:000382995600007
ISSN
1040-7782
DOI
10.1080/10407782.2016.1193351
language
English
LU publication?
yes
id
650b5456-b4bb-4fd5-8c01-bf38a195aace
date added to LUP
2016-11-03 10:10:37
date last changed
2017-10-29 04:53:31
@article{650b5456-b4bb-4fd5-8c01-bf38a195aace,
  abstract     = {<p>Because natural gas resources continue to be depleted for usage of gas turbines, it becomes important to search for alternate fuels. Coal-derived synthetic fuels contain traces of ash and other contaminants that result in deposition on vane and turbine surfaces. The present research shows a comparison of simulated results with and without a deposition configuration. Film cooling effectiveness distribution after the deposition was obtained to investigate the effects of various deposition heights and widths under the blowing ratios of 0.5, 0.75, and 1.0. The results indicated that the deposition near the hole exit can weaken the cooling performance. Moreover, it is revealed that the film cooling effectiveness deteriorates with increased deposition heights. The deposition width study revealed that a narrow deposition shows a good attachment of the coolant jet to the wall surface. It is found that an improvement of the film cooling effectiveness can be obtained by decreasing the blowing ratio.</p>},
  author       = {Wang, Jin and Cui, Pei and Sundén, Bengt and Vujanović, Milan},
  issn         = {1040-7782},
  language     = {eng},
  month        = {09},
  number       = {6},
  pages        = {673--687},
  publisher    = {Taylor & Francis},
  series       = {Numerical Heat Transfer; Part A: Applications},
  title        = {Effects of deposition height and width on film cooling},
  url          = {http://dx.doi.org/10.1080/10407782.2016.1193351},
  volume       = {70},
  year         = {2016},
}