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EFFECTS OF INTERNAL COOLANT CROSSFLOW ON FILM-COOLING PERFORMANCE OF DOUBLE-JET AND CYLINDRICAL HOLES

Zhu, Huaitao ; Xie, Gongnan LU ; Zhu, Rui and Sunden, Bengt LU (2022) ASME Turbo Expo 2022: Turbomachinery Technical Conference and Exposition, GT 2022 In Proceedings of the ASME Turbo Expo 6-A.
Abstract

In this paper, the effects of internal coolant crossflow on double-jet holes were simulated and compared with two rows of cylindrical holes under three blowing ratios (M = 0.5, 1.0, and 1.5), with an established and validated turbulence model. The results show that double-jet holes can provide better film cooling performance for the three different blowing ratios compared with cylindrical holes. As the blowing ratio increases, the superiority of double-jet holes becomes more obvious. The introduction of crossflow can significantly enlarge the coolant coverage area of cylindrical holes, and increase the laterally-averaged film cooling effectiveness. For double-jet holes, the internal coolant crossflow also increases the laterally... (More)

In this paper, the effects of internal coolant crossflow on double-jet holes were simulated and compared with two rows of cylindrical holes under three blowing ratios (M = 0.5, 1.0, and 1.5), with an established and validated turbulence model. The results show that double-jet holes can provide better film cooling performance for the three different blowing ratios compared with cylindrical holes. As the blowing ratio increases, the superiority of double-jet holes becomes more obvious. The introduction of crossflow can significantly enlarge the coolant coverage area of cylindrical holes, and increase the laterally-averaged film cooling effectiveness. For double-jet holes, the internal coolant crossflow also increases the laterally averaged film cooling effectiveness, but the improvement is limited. For the -45o compound angle film hole of double-jet holes, the internal coolant crossflow decreases the normal velocity (momentum), and makes the coolant to attach on the plate. However, for the other hole, the influence is opposite, the normal velocity (momentum) is increased and the coolant is detached from the plate.

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Please use this url to cite or link to this publication:
author
; ; and
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Double-jet hole, Film cooling effectiveness, Anti-kidney vortex structure, Internal crossflow
host publication
Heat Transfer - Combustors; Film Cooling
series title
Proceedings of the ASME Turbo Expo
volume
6-A
article number
V06AT12A028
publisher
American Society Of Mechanical Engineers (ASME)
conference name
ASME Turbo Expo 2022: Turbomachinery Technical Conference and Exposition, GT 2022
conference location
Rotterdam, Netherlands
conference dates
2022-06-13 - 2022-06-17
external identifiers
  • scopus:85141457518
ISBN
9780791886038
DOI
10.1115/GT2022-82514
language
English
LU publication?
yes
id
1a591f7d-fe76-41dc-8af7-4c1e13e78fb1
date added to LUP
2022-12-08 14:22:26
date last changed
2023-11-20 07:36:42
@inproceedings{1a591f7d-fe76-41dc-8af7-4c1e13e78fb1,
  abstract     = {{<p>In this paper, the effects of internal coolant crossflow on double-jet holes were simulated and compared with two rows of cylindrical holes under three blowing ratios (M = 0.5, 1.0, and 1.5), with an established and validated turbulence model. The results show that double-jet holes can provide better film cooling performance for the three different blowing ratios compared with cylindrical holes. As the blowing ratio increases, the superiority of double-jet holes becomes more obvious. The introduction of crossflow can significantly enlarge the coolant coverage area of cylindrical holes, and increase the laterally-averaged film cooling effectiveness. For double-jet holes, the internal coolant crossflow also increases the laterally averaged film cooling effectiveness, but the improvement is limited. For the -45<sup>o</sup> compound angle film hole of double-jet holes, the internal coolant crossflow decreases the normal velocity (momentum), and makes the coolant to attach on the plate. However, for the other hole, the influence is opposite, the normal velocity (momentum) is increased and the coolant is detached from the plate.</p>}},
  author       = {{Zhu, Huaitao and Xie, Gongnan and Zhu, Rui and Sunden, Bengt}},
  booktitle    = {{Heat Transfer - Combustors; Film Cooling}},
  isbn         = {{9780791886038}},
  keywords     = {{Double-jet hole; Film cooling effectiveness, Anti-kidney vortex structure; Internal crossflow}},
  language     = {{eng}},
  publisher    = {{American Society Of Mechanical Engineers (ASME)}},
  series       = {{Proceedings of the ASME Turbo Expo}},
  title        = {{EFFECTS OF INTERNAL COOLANT CROSSFLOW ON FILM-COOLING PERFORMANCE OF DOUBLE-JET AND CYLINDRICAL HOLES}},
  url          = {{http://dx.doi.org/10.1115/GT2022-82514}},
  doi          = {{10.1115/GT2022-82514}},
  volume       = {{6-A}},
  year         = {{2022}},
}