Effect of combined hole configuration on film cooling with and without mist injection
(2018) In Thermal Science 22(5). p.1923-1931- Abstract
Turbine blades operate under a harsh environmental condition, and the inlet temperature of gas turbines is increasing with requirement of high engine effi-ciency. Some cooling schemes are adopted to prevent these blades from the ther-mal erosion of the hot mainstream. Film cooling technology is used widely and effectively in gas turbines. The coolant air is suppressed to the wall by the main-stream after jetting out of the film hole. A new hole configuration is first pro-posed to improve the film cooling characteristics in this paper. Comparison be-tween a conventional cylindrical hole and a new combined hole is conducted by CFD, and effects of various blowing ratios and droplet sizes are also investigat-ed. Results show that the... (More)
Turbine blades operate under a harsh environmental condition, and the inlet temperature of gas turbines is increasing with requirement of high engine effi-ciency. Some cooling schemes are adopted to prevent these blades from the ther-mal erosion of the hot mainstream. Film cooling technology is used widely and effectively in gas turbines. The coolant air is suppressed to the wall by the main-stream after jetting out of the film hole. A new hole configuration is first pro-posed to improve the film cooling characteristics in this paper. Comparison be-tween a conventional cylindrical hole and a new combined hole is conducted by CFD, and effects of various blowing ratios and droplet sizes are also investigat-ed. Results show that the combined hole configuration provides a wider coverage than that in the cylindrical hole configuration case at high blowing ratios (M = 1.0 and M = 1.5). In addition, the film cooling with mist injection also provides a significant enhancement on cooling performance especially for the combined hole case with a small droplet size (10-5 m).
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- author
- Tian, Ke ; Wang, Jin LU ; Liu, Chao ; Baleta, Jakov ; Yang, Li and Sunden, Bengt LU
- organization
- publishing date
- 2018
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Blowing ratio, CFD, Combined hole, Film cooling, Mist
- in
- Thermal Science
- volume
- 22
- issue
- 5
- pages
- 9 pages
- publisher
- Vinca Inst Nuclear Sci
- external identifiers
-
- scopus:85056281039
- ISSN
- 0354-9836
- DOI
- 10.2298/TSCI171228266T
- language
- English
- LU publication?
- yes
- id
- f041fbbd-aa76-4b1b-b5f5-6565ecf7a963
- date added to LUP
- 2018-11-23 12:08:04
- date last changed
- 2022-04-18 00:37:19
@article{f041fbbd-aa76-4b1b-b5f5-6565ecf7a963,
abstract = {{<p>Turbine blades operate under a harsh environmental condition, and the inlet temperature of gas turbines is increasing with requirement of high engine effi-ciency. Some cooling schemes are adopted to prevent these blades from the ther-mal erosion of the hot mainstream. Film cooling technology is used widely and effectively in gas turbines. The coolant air is suppressed to the wall by the main-stream after jetting out of the film hole. A new hole configuration is first pro-posed to improve the film cooling characteristics in this paper. Comparison be-tween a conventional cylindrical hole and a new combined hole is conducted by CFD, and effects of various blowing ratios and droplet sizes are also investigat-ed. Results show that the combined hole configuration provides a wider coverage than that in the cylindrical hole configuration case at high blowing ratios (M = 1.0 and M = 1.5). In addition, the film cooling with mist injection also provides a significant enhancement on cooling performance especially for the combined hole case with a small droplet size (10<sup>-5</sup> m).</p>}},
author = {{Tian, Ke and Wang, Jin and Liu, Chao and Baleta, Jakov and Yang, Li and Sunden, Bengt}},
issn = {{0354-9836}},
keywords = {{Blowing ratio; CFD; Combined hole; Film cooling; Mist}},
language = {{eng}},
number = {{5}},
pages = {{1923--1931}},
publisher = {{Vinca Inst Nuclear Sci}},
series = {{Thermal Science}},
title = {{Effect of combined hole configuration on film cooling with and without mist injection}},
url = {{http://dx.doi.org/10.2298/TSCI171228266T}},
doi = {{10.2298/TSCI171228266T}},
volume = {{22}},
year = {{2018}},
}