EFFECT OF DIELECTRIC BARRIER DISCHARGE PLASMA ON FILM COOLING PERFORMANCE
(2022) In Thermal Science 26(5). p.4157-4168- Abstract
To improve film cooling effectiveness of a gas turbine blade, a kind of plasma ac-tuator is introduced on the blade surface. The effect of three arrangements of plasma actuators on flow characteristics and film cooling performance is numer-ically investigated by a verified turbulence model. Results show that the coolant air under plasma is pulled down to the wall, and the near-wall air is sped up to promote the film cooling effectiveness downstream the wall. It is discovered that the plasma actuators near the film hole show weaker aerodynamic actuation than that downstream the wall. Compared with the plasma actuators off case, the max-imum improvement in the wall-averaged film cooling effectiveness of the case with up plasma actuators... (More)
To improve film cooling effectiveness of a gas turbine blade, a kind of plasma ac-tuator is introduced on the blade surface. The effect of three arrangements of plasma actuators on flow characteristics and film cooling performance is numer-ically investigated by a verified turbulence model. Results show that the coolant air under plasma is pulled down to the wall, and the near-wall air is sped up to promote the film cooling effectiveness downstream the wall. It is discovered that the plasma actuators near the film hole show weaker aerodynamic actuation than that downstream the wall. Compared with the plasma actuators off case, the max-imum improvement in the wall-averaged film cooling effectiveness of the case with up plasma actuators is 11.7% under low blowing ratios. The wall-averaged film cooling effectivenesses of the cases with down plasma actuators and up-down plasma actuators increase by 138.3% and 122.9% under the blowing ratio of 1.5.. Vortex structures are broken up, and vortex is separated by two jets in-duced by aerodynamic actuation. The maximum wall pressure difference reaches 1.89% when plasma actuator is arranged downstream the wall.
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- author
- Sun, Jie LU ; Zhang, Fuxing ; Wang, Jin LU ; Baleta, Jakov ; Xie, Gongnan LU and Sunden, Bengt LU
- organization
- publishing date
- 2022
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Aerodynamic actuation, Film cooling, Flow control, Gas turbine, Plasma arrangement
- in
- Thermal Science
- volume
- 26
- issue
- 5
- pages
- 12 pages
- publisher
- Vinca Inst Nuclear Sci
- external identifiers
-
- scopus:85140593163
- ISSN
- 0354-9836
- DOI
- 10.2298/TSCI2205157S
- language
- English
- LU publication?
- yes
- id
- 54f3c365-b61a-4c8a-8130-7486f673d4c4
- date added to LUP
- 2022-12-19 14:21:43
- date last changed
- 2023-11-21 14:10:56
@article{54f3c365-b61a-4c8a-8130-7486f673d4c4, abstract = {{<p>To improve film cooling effectiveness of a gas turbine blade, a kind of plasma ac-tuator is introduced on the blade surface. The effect of three arrangements of plasma actuators on flow characteristics and film cooling performance is numer-ically investigated by a verified turbulence model. Results show that the coolant air under plasma is pulled down to the wall, and the near-wall air is sped up to promote the film cooling effectiveness downstream the wall. It is discovered that the plasma actuators near the film hole show weaker aerodynamic actuation than that downstream the wall. Compared with the plasma actuators off case, the max-imum improvement in the wall-averaged film cooling effectiveness of the case with up plasma actuators is 11.7% under low blowing ratios. The wall-averaged film cooling effectivenesses of the cases with down plasma actuators and up-down plasma actuators increase by 138.3% and 122.9% under the blowing ratio of 1.5.. Vortex structures are broken up, and vortex is separated by two jets in-duced by aerodynamic actuation. The maximum wall pressure difference reaches 1.89% when plasma actuator is arranged downstream the wall.</p>}}, author = {{Sun, Jie and Zhang, Fuxing and Wang, Jin and Baleta, Jakov and Xie, Gongnan and Sunden, Bengt}}, issn = {{0354-9836}}, keywords = {{Aerodynamic actuation; Film cooling; Flow control; Gas turbine; Plasma arrangement}}, language = {{eng}}, number = {{5}}, pages = {{4157--4168}}, publisher = {{Vinca Inst Nuclear Sci}}, series = {{Thermal Science}}, title = {{EFFECT OF DIELECTRIC BARRIER DISCHARGE PLASMA ON FILM COOLING PERFORMANCE}}, url = {{http://dx.doi.org/10.2298/TSCI2205157S}}, doi = {{10.2298/TSCI2205157S}}, volume = {{26}}, year = {{2022}}, }