Investigation of heat transfer and fluid flow over pocket cavity in the rear part of gas turbine
(2016) ASME 2016 International Mechanical Engineering Congress and Exposition, IMECE 2016 8.- Abstract
The pocket cavity is generated at the transition part between the low pressure turbine (LPT) and outlet guide vane (OGV) in a gas turbine engine. Because the important connection with OGV, the heat transfer and fluid flow need to be investigated and analyzed. In the present work, a simplified triangular pocket cavity is built and heat transfer and fluid flow are investigated experimentally and numerically. Liquid Crystal Thermography (LCT) is employed to measure the heat transfer over the pocket surface with Reynolds number ranging from 54,054 to 135,135. In addition, two fillets with different radii are designed to investigate the flow structures over the pocket surface. The turbulent flow details are provided by numerically... (More)
The pocket cavity is generated at the transition part between the low pressure turbine (LPT) and outlet guide vane (OGV) in a gas turbine engine. Because the important connection with OGV, the heat transfer and fluid flow need to be investigated and analyzed. In the present work, a simplified triangular pocket cavity is built and heat transfer and fluid flow are investigated experimentally and numerically. Liquid Crystal Thermography (LCT) is employed to measure the heat transfer over the pocket surface with Reynolds number ranging from 54,054 to 135,135. In addition, two fillets with different radii are designed to investigate the flow structures over the pocket surface. The turbulent flow details are provided by numerically calculations based on the commercial software Fluent 15.0 with a validated turbulence model. Based on the results, the highest heat transfer value is located in the downstream boundary of the pocket cavity where the strongest flow impingement happens. The smaller fillet radius presents a higher heat transfer peak value and also induces stronger recirculating flow inside the pocket cavity. Considering the design requirement in the rear part of a gas turbine, i.e., to decrease the heat transfer peak value, a larger fillet radius is recommended for practical design. The heat transfer and flow details also provide a reliable reference for gas turbine engine design.
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- author
- Liu, Jian LU ; Wang, Chenglong LU ; Wang, Lei LU ; Xie, Gongnan LU ; Andersson, Martin LU ; Sundén, Bengt LU ; Abrahamsson, Hans and Arroyo, Carlos
- organization
- publishing date
- 2016
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- Fillet radius, Flow impingement, LCT, Peak value, Pocket cavity, Turbulence model
- host publication
- Heat Transfer and Thermal Engineering
- volume
- 8
- article number
- IMECE2016-66059
- publisher
- American Society Of Mechanical Engineers (ASME)
- conference name
- ASME 2016 International Mechanical Engineering Congress and Exposition, IMECE 2016
- conference location
- Phoenix, United States
- conference dates
- 2016-11-11 - 2016-11-17
- external identifiers
-
- scopus:85021833178
- ISBN
- 9780791850626
- DOI
- 10.1115/IMECE2016-66059
- language
- English
- LU publication?
- yes
- id
- ec264088-a3c5-418b-8814-c043088827c5
- date added to LUP
- 2017-07-20 11:57:53
- date last changed
- 2022-01-30 21:37:40
@inproceedings{ec264088-a3c5-418b-8814-c043088827c5,
abstract = {{<p>The pocket cavity is generated at the transition part between the low pressure turbine (LPT) and outlet guide vane (OGV) in a gas turbine engine. Because the important connection with OGV, the heat transfer and fluid flow need to be investigated and analyzed. In the present work, a simplified triangular pocket cavity is built and heat transfer and fluid flow are investigated experimentally and numerically. Liquid Crystal Thermography (LCT) is employed to measure the heat transfer over the pocket surface with Reynolds number ranging from 54,054 to 135,135. In addition, two fillets with different radii are designed to investigate the flow structures over the pocket surface. The turbulent flow details are provided by numerically calculations based on the commercial software Fluent 15.0 with a validated turbulence model. Based on the results, the highest heat transfer value is located in the downstream boundary of the pocket cavity where the strongest flow impingement happens. The smaller fillet radius presents a higher heat transfer peak value and also induces stronger recirculating flow inside the pocket cavity. Considering the design requirement in the rear part of a gas turbine, i.e., to decrease the heat transfer peak value, a larger fillet radius is recommended for practical design. The heat transfer and flow details also provide a reliable reference for gas turbine engine design.</p>}},
author = {{Liu, Jian and Wang, Chenglong and Wang, Lei and Xie, Gongnan and Andersson, Martin and Sundén, Bengt and Abrahamsson, Hans and Arroyo, Carlos}},
booktitle = {{Heat Transfer and Thermal Engineering}},
isbn = {{9780791850626}},
keywords = {{Fillet radius; Flow impingement; LCT; Peak value; Pocket cavity; Turbulence model}},
language = {{eng}},
publisher = {{American Society Of Mechanical Engineers (ASME)}},
title = {{Investigation of heat transfer and fluid flow over pocket cavity in the rear part of gas turbine}},
url = {{http://dx.doi.org/10.1115/IMECE2016-66059}},
doi = {{10.1115/IMECE2016-66059}},
volume = {{8}},
year = {{2016}},
}