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Investigation of heat transfer and fluid flow over pocket cavity in the rear part of gas turbine

Liu, Jian LU ; Wang, Chenglong LU ; Wang, Lei LU ; Xie, Gongnan LU ; Andersson, Martin LU ; Sundén, Bengt LU ; Abrahamsson, Hans and Arroyo, Carlos (2016) ASME 2016 International Mechanical Engineering Congress and Exposition, IMECE 2016 In Heat Transfer and Thermal Engineering 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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Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Fillet radius, Flow impingement, LCT, Peak value, Pocket cavity, Turbulence model
in
Heat Transfer and Thermal Engineering
volume
8
publisher
American Society Of Mechanical Engineers (ASME)
conference name
ASME 2016 International Mechanical Engineering Congress and Exposition, IMECE 2016
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
2017-08-08 13:40:42
@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},
  keyword      = {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},
  volume       = {8},
  year         = {2016},
}