Film Cooling in the Cutback for Trailing Edge With Different Incident Angles
(2023) In Journal of Energy Resources Technology, Transactions of the ASME 145(5).- Abstract
The cutback film cooling was important to decrease the trailing edge temperature and prolong the working life of gas turbines. Many investigations concerning cutback film cooling have already been done. However, only a few papers involve the influence of incident angle on the film cooling effectiveness (η) at the trailing region. In this work, detached eddy simulation (DES) is applied to calculate the η near the cutback region for different incident angles. Five different incident angles (0 deg, 5 deg, 10 deg, 15 deg, and 20 deg) and three blowing ratios (0.2, 0.8, and 1.25) are considered. The flow structure, temperature distribution, and η characteristics are analyzed in detail. Results imply that the incident angle changes the flow... (More)
The cutback film cooling was important to decrease the trailing edge temperature and prolong the working life of gas turbines. Many investigations concerning cutback film cooling have already been done. However, only a few papers involve the influence of incident angle on the film cooling effectiveness (η) at the trailing region. In this work, detached eddy simulation (DES) is applied to calculate the η near the cutback region for different incident angles. Five different incident angles (0 deg, 5 deg, 10 deg, 15 deg, and 20 deg) and three blowing ratios (0.2, 0.8, and 1.25) are considered. The flow structure, temperature distribution, and η characteristics are analyzed in detail. Results imply that the incident angle changes the flow structure notably. As the incident angle increases, the separation region is suppressed, but the η was changed nonlinearly. At the low blowing ratio, the incident angle mainly affects the η near the slot. However, the incident angle changes the η downstream of the slot exit under a high blowing ratio. When the blowing ratio becomes large, the η near the centerline becomes larger.
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- author
- Du, Wei LU ; Luo, Lei ; Wang, Songtao ; Jiao, Yinghou and Sunden, Bengt LU
- organization
- publishing date
- 2023-05
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- cutback region, energy conversion/systems, energy systems analysis, film cooling, gas turbine, heat energy generation/storage/transfer, incident angle, trailing edge
- in
- Journal of Energy Resources Technology, Transactions of the ASME
- volume
- 145
- issue
- 5
- article number
- 053201
- publisher
- American Society Of Mechanical Engineers (ASME)
- external identifiers
-
- scopus:85182400984
- ISSN
- 0195-0738
- DOI
- 10.1115/1.4055842
- language
- English
- LU publication?
- yes
- id
- 4196ddbe-5c5f-4c22-b582-59d08b548b73
- date added to LUP
- 2024-02-13 15:13:41
- date last changed
- 2024-02-13 15:15:04
@article{4196ddbe-5c5f-4c22-b582-59d08b548b73,
abstract = {{<p>The cutback film cooling was important to decrease the trailing edge temperature and prolong the working life of gas turbines. Many investigations concerning cutback film cooling have already been done. However, only a few papers involve the influence of incident angle on the film cooling effectiveness (η) at the trailing region. In this work, detached eddy simulation (DES) is applied to calculate the η near the cutback region for different incident angles. Five different incident angles (0 deg, 5 deg, 10 deg, 15 deg, and 20 deg) and three blowing ratios (0.2, 0.8, and 1.25) are considered. The flow structure, temperature distribution, and η characteristics are analyzed in detail. Results imply that the incident angle changes the flow structure notably. As the incident angle increases, the separation region is suppressed, but the η was changed nonlinearly. At the low blowing ratio, the incident angle mainly affects the η near the slot. However, the incident angle changes the η downstream of the slot exit under a high blowing ratio. When the blowing ratio becomes large, the η near the centerline becomes larger.</p>}},
author = {{Du, Wei and Luo, Lei and Wang, Songtao and Jiao, Yinghou and Sunden, Bengt}},
issn = {{0195-0738}},
keywords = {{cutback region; energy conversion/systems; energy systems analysis; film cooling; gas turbine; heat energy generation/storage/transfer; incident angle; trailing edge}},
language = {{eng}},
number = {{5}},
publisher = {{American Society Of Mechanical Engineers (ASME)}},
series = {{Journal of Energy Resources Technology, Transactions of the ASME}},
title = {{Film Cooling in the Cutback for Trailing Edge With Different Incident Angles}},
url = {{http://dx.doi.org/10.1115/1.4055842}},
doi = {{10.1115/1.4055842}},
volume = {{145}},
year = {{2023}},
}