Heat Transfer Enhancement of a Gas Turbine Blade-Tip Wall
(2014) p.67-88- Abstract
- The blade-tip region encounters high thermal loads because of the hot gas leakage flows. A common way to cool blade tips is to design serpentine passages with 180 degrees turn with the blade-tip walls inside the turbine blades. Improved internal convective cooling is therefore required to increase blade-tip lifetime. This chapter summarizes the heat transfer enhancement of an internal blade-tip wall having pins, dimples and protrusions, and the influence of guide ribs and pins material. It is found that the pinned tip exhibits best performance to improve the blade-tip cooling. However, when considering the added mechanical stress, making dimples is a more suitable way especially at low Reynolds numbers. Properly designed guide ribs might... (More)
- The blade-tip region encounters high thermal loads because of the hot gas leakage flows. A common way to cool blade tips is to design serpentine passages with 180 degrees turn with the blade-tip walls inside the turbine blades. Improved internal convective cooling is therefore required to increase blade-tip lifetime. This chapter summarizes the heat transfer enhancement of an internal blade-tip wall having pins, dimples and protrusions, and the influence of guide ribs and pins material. It is found that the pinned tip exhibits best performance to improve the blade-tip cooling. However, when considering the added mechanical stress, making dimples is a more suitable way especially at low Reynolds numbers. Properly designed guide ribs might reduce the pressure loss. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/4803708
- author
- Xie, G. and Sundén, Bengt LU
- organization
- publishing date
- 2014
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- Blade-tip wall, heat transfer enhancement, numerical simulation
- host publication
- Emerging Topics in Heat Transfer: Enhancement and Heat Exchangers
- editor
- Sundén, Bengt ; Wang, Qiuwang and Chen, Yitung
- pages
- 67 - 88
- publisher
- WIT Press
- external identifiers
-
- wos:000342565900004
- ISBN
- 978-1-84564-819-0
- language
- English
- LU publication?
- yes
- id
- 0cf09b3f-53dc-422e-8647-00ec0047e00f (old id 4803708)
- date added to LUP
- 2016-04-04 11:00:58
- date last changed
- 2018-11-21 21:02:08
@inbook{0cf09b3f-53dc-422e-8647-00ec0047e00f,
abstract = {{The blade-tip region encounters high thermal loads because of the hot gas leakage flows. A common way to cool blade tips is to design serpentine passages with 180 degrees turn with the blade-tip walls inside the turbine blades. Improved internal convective cooling is therefore required to increase blade-tip lifetime. This chapter summarizes the heat transfer enhancement of an internal blade-tip wall having pins, dimples and protrusions, and the influence of guide ribs and pins material. It is found that the pinned tip exhibits best performance to improve the blade-tip cooling. However, when considering the added mechanical stress, making dimples is a more suitable way especially at low Reynolds numbers. Properly designed guide ribs might reduce the pressure loss.}},
author = {{Xie, G. and Sundén, Bengt}},
booktitle = {{Emerging Topics in Heat Transfer: Enhancement and Heat Exchangers}},
editor = {{Sundén, Bengt and Wang, Qiuwang and Chen, Yitung}},
isbn = {{978-1-84564-819-0}},
keywords = {{Blade-tip wall; heat transfer enhancement; numerical simulation}},
language = {{eng}},
pages = {{67--88}},
publisher = {{WIT Press}},
title = {{Heat Transfer Enhancement of a Gas Turbine Blade-Tip Wall}},
year = {{2014}},
}