EFFECTS OF INTERNAL COOLANT CROSSFLOW ON FILM-COOLING PERFORMANCE OF DOUBLE-JET AND CYLINDRICAL HOLES
(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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- author
- Zhu, Huaitao ; Xie, Gongnan LU ; Zhu, Rui and Sunden, Bengt LU
- organization
- publishing date
- 2022
- 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}}, }