Experimental study of pressure drop and heat transfer in a U bend channel with various guide vanes and ribs
(2015) In Journal of Enhanced Heat Transfer 22(1). p.29-45- Abstract
- An experimental study was conducted to investigate pressure drop and heat transfer in a U-bend section with various configurations of guide vanes and two kinds of rib shapes on the outer wall. Ten guide vane types were tested. Results highlight that the use of special guide vanes can reduce the pressure drop penalty up to a maximum of 31%. However, guide vanes are usually associated with heat transfer reduction. To further enhance heat transfer, transverse and V-shaped ribs were attached on the outer wall. Thermal performance evaluation showed that the 45 degrees V-shaped downstream-pointing ribs coupled with guide vane configuration 5 give the best thermal performance. The results of this study can be employed to improve the internal... (More)
- An experimental study was conducted to investigate pressure drop and heat transfer in a U-bend section with various configurations of guide vanes and two kinds of rib shapes on the outer wall. Ten guide vane types were tested. Results highlight that the use of special guide vanes can reduce the pressure drop penalty up to a maximum of 31%. However, guide vanes are usually associated with heat transfer reduction. To further enhance heat transfer, transverse and V-shaped ribs were attached on the outer wall. Thermal performance evaluation showed that the 45 degrees V-shaped downstream-pointing ribs coupled with guide vane configuration 5 give the best thermal performance. The results of this study can be employed to improve the internal design of modern gas turbine blade cooling systems. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/8548760
- author
- Cimina, Susanna ; Wang, Chenglong LU ; Wang, Lei LU ; Niro, Alfonso and Sundén, Bengt LU
- organization
- publishing date
- 2015
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- rough surfaces, structured roughness, single-phase flow, bend duct, geometry, guide vanes, liquid crystal thermography
- in
- Journal of Enhanced Heat Transfer
- volume
- 22
- issue
- 1
- pages
- 29 - 45
- publisher
- Begell House
- external identifiers
-
- wos:000367104400002
- scopus:84950312837
- ISSN
- 1563-5074
- DOI
- 10.1615/JEnhHeatTransf.2015013382
- language
- English
- LU publication?
- yes
- id
- f5eabc52-3bc4-428a-8748-b4fb9c2f6b8d (old id 8548760)
- date added to LUP
- 2016-04-01 09:50:39
- date last changed
- 2022-04-11 23:28:22
@article{f5eabc52-3bc4-428a-8748-b4fb9c2f6b8d,
abstract = {{An experimental study was conducted to investigate pressure drop and heat transfer in a U-bend section with various configurations of guide vanes and two kinds of rib shapes on the outer wall. Ten guide vane types were tested. Results highlight that the use of special guide vanes can reduce the pressure drop penalty up to a maximum of 31%. However, guide vanes are usually associated with heat transfer reduction. To further enhance heat transfer, transverse and V-shaped ribs were attached on the outer wall. Thermal performance evaluation showed that the 45 degrees V-shaped downstream-pointing ribs coupled with guide vane configuration 5 give the best thermal performance. The results of this study can be employed to improve the internal design of modern gas turbine blade cooling systems.}},
author = {{Cimina, Susanna and Wang, Chenglong and Wang, Lei and Niro, Alfonso and Sundén, Bengt}},
issn = {{1563-5074}},
keywords = {{rough surfaces; structured roughness; single-phase flow; bend duct; geometry; guide vanes; liquid crystal thermography}},
language = {{eng}},
number = {{1}},
pages = {{29--45}},
publisher = {{Begell House}},
series = {{Journal of Enhanced Heat Transfer}},
title = {{Experimental study of pressure drop and heat transfer in a U bend channel with various guide vanes and ribs}},
url = {{http://dx.doi.org/10.1615/JEnhHeatTransf.2015013382}},
doi = {{10.1615/JEnhHeatTransf.2015013382}},
volume = {{22}},
year = {{2015}},
}