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EFFECT OF DIELECTRIC BARRIER DISCHARGE PLASMA ON FILM COOLING PERFORMANCE

Sun, Jie LU ; Zhang, Fuxing ; Wang, Jin LU ; Baleta, Jakov ; Xie, Gongnan LU and Sunden, Bengt LU (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
; ; ; ; and
organization
publishing date
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}},
}