Effect of spherical blockage configurations on film cooling
(2018) In Thermal Science 22(5). p.1933-1942- Abstract
With increasing inlet temperature of gas turbines, turbine blades need to be effec-tively protected by using cooling technologies. However, the deposition from the fuel impurities and dust particles in the air is often found inside film holes, which results in partial hole blockage. In this paper, the deposition geometry is simpli-fied as a rectangular channel, and the effect of three blockage ratios is investi-gated by using the computational fluid dynamics. In addition, water droplets are also released from the coolant inlet to provide a comparison of the results with and without mist injection. It is found that the lateral film cooling effectiveness is reduced with increasing blockage ratio. For all the cases with the blowing ratio... (More)
With increasing inlet temperature of gas turbines, turbine blades need to be effec-tively protected by using cooling technologies. However, the deposition from the fuel impurities and dust particles in the air is often found inside film holes, which results in partial hole blockage. In this paper, the deposition geometry is simpli-fied as a rectangular channel, and the effect of three blockage ratios is investi-gated by using the computational fluid dynamics. In addition, water droplets are also released from the coolant inlet to provide a comparison of the results with and without mist injection. It is found that the lateral film cooling effectiveness is reduced with increasing blockage ratio. For all the cases with the blowing ratio 0.6, 1% mist injection provides an improvement of the cooling performance by approximately 10%.
(Less)
- author
- Wang, Jin LU ; Tian, Ke ; Zhang, Kai ; Baleta, Jakov and Sunden, Bengt LU
- organization
- publishing date
- 2018
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Blockage, Film cooling, Gas turbine, Mist injection, Sphere
- in
- Thermal Science
- volume
- 22
- issue
- 5
- pages
- 10 pages
- publisher
- Vinca Inst Nuclear Sci
- external identifiers
-
- scopus:85056286563
- ISSN
- 0354-9836
- DOI
- 10.2298/TSCI171229257W
- language
- English
- LU publication?
- yes
- id
- 53a76de8-1044-4ca5-957b-b78269d61bd2
- date added to LUP
- 2018-11-23 13:05:36
- date last changed
- 2022-04-18 00:37:19
@article{53a76de8-1044-4ca5-957b-b78269d61bd2,
abstract = {{<p>With increasing inlet temperature of gas turbines, turbine blades need to be effec-tively protected by using cooling technologies. However, the deposition from the fuel impurities and dust particles in the air is often found inside film holes, which results in partial hole blockage. In this paper, the deposition geometry is simpli-fied as a rectangular channel, and the effect of three blockage ratios is investi-gated by using the computational fluid dynamics. In addition, water droplets are also released from the coolant inlet to provide a comparison of the results with and without mist injection. It is found that the lateral film cooling effectiveness is reduced with increasing blockage ratio. For all the cases with the blowing ratio 0.6, 1% mist injection provides an improvement of the cooling performance by approximately 10%.</p>}},
author = {{Wang, Jin and Tian, Ke and Zhang, Kai and Baleta, Jakov and Sunden, Bengt}},
issn = {{0354-9836}},
keywords = {{Blockage; Film cooling; Gas turbine; Mist injection; Sphere}},
language = {{eng}},
number = {{5}},
pages = {{1933--1942}},
publisher = {{Vinca Inst Nuclear Sci}},
series = {{Thermal Science}},
title = {{Effect of spherical blockage configurations on film cooling}},
url = {{http://dx.doi.org/10.2298/TSCI171229257W}},
doi = {{10.2298/TSCI171229257W}},
volume = {{22}},
year = {{2018}},
}