Heat transfer and fluid flow of a single jet impingement in Crossflow modified by a vortex generator pair
(2016) ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition, GT 2016 5A-2016.- Abstract
Jet impingement cooling is widely used in modern gas turbines. In the present study, both heat transfer and flow field measurements of jet impingement in cross-flow are carried out with and without a vortex generator pair (VGP). The jet and cross-flow Reynolds numbers are fixed at 15,000 and 48,000, respectively. The local heat transfer coefficients are obtained by a liquid crystal thermography (LCT) technique. Results show that the jet impingement heat transfer on the target wall is remarkably enhanced by the VGP as compared to the baseline case. The stagnation region moves upstream with improved heat transfer when the VGP is present. The flow field is measured by particle image velocimetry (PIV). The cross-flow is shown to deflect the... (More)
Jet impingement cooling is widely used in modern gas turbines. In the present study, both heat transfer and flow field measurements of jet impingement in cross-flow are carried out with and without a vortex generator pair (VGP). The jet and cross-flow Reynolds numbers are fixed at 15,000 and 48,000, respectively. The local heat transfer coefficients are obtained by a liquid crystal thermography (LCT) technique. Results show that the jet impingement heat transfer on the target wall is remarkably enhanced by the VGP as compared to the baseline case. The stagnation region moves upstream with improved heat transfer when the VGP is present. The flow field is measured by particle image velocimetry (PIV). The cross-flow is shown to deflect the impinging jet but the VGP reduces the streamwise momentum of the cross-flow and drives the crossflow away from the issuing jet. This leads to stronger jet impingement and thus heat transfer enhancement on the target all.
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- author
- Wang, Chenglong LU ; Luo, Lei ; Wang, Lei LU and Sundén, Bengt LU
- organization
- publishing date
- 2016
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- host publication
- Heat Transfer
- volume
- 5A-2016
- article number
- GT2016-56894
- publisher
- American Society Of Mechanical Engineers (ASME)
- conference name
- ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition, GT 2016
- conference location
- Seoul, Korea, Republic of
- conference dates
- 2016-06-13 - 2016-06-17
- external identifiers
-
- scopus:84991662113
- ISBN
- 9780791849781
- DOI
- 10.1115/GT2016-56894
- language
- English
- LU publication?
- yes
- id
- 9be2cf52-6f55-4d9f-b042-a1a8410d681d
- date added to LUP
- 2017-02-24 10:17:29
- date last changed
- 2022-03-01 20:08:02
@inproceedings{9be2cf52-6f55-4d9f-b042-a1a8410d681d, abstract = {{<p>Jet impingement cooling is widely used in modern gas turbines. In the present study, both heat transfer and flow field measurements of jet impingement in cross-flow are carried out with and without a vortex generator pair (VGP). The jet and cross-flow Reynolds numbers are fixed at 15,000 and 48,000, respectively. The local heat transfer coefficients are obtained by a liquid crystal thermography (LCT) technique. Results show that the jet impingement heat transfer on the target wall is remarkably enhanced by the VGP as compared to the baseline case. The stagnation region moves upstream with improved heat transfer when the VGP is present. The flow field is measured by particle image velocimetry (PIV). The cross-flow is shown to deflect the impinging jet but the VGP reduces the streamwise momentum of the cross-flow and drives the crossflow away from the issuing jet. This leads to stronger jet impingement and thus heat transfer enhancement on the target all.</p>}}, author = {{Wang, Chenglong and Luo, Lei and Wang, Lei and Sundén, Bengt}}, booktitle = {{Heat Transfer}}, isbn = {{9780791849781}}, language = {{eng}}, publisher = {{American Society Of Mechanical Engineers (ASME)}}, title = {{Heat transfer and fluid flow of a single jet impingement in Crossflow modified by a vortex generator pair}}, url = {{http://dx.doi.org/10.1115/GT2016-56894}}, doi = {{10.1115/GT2016-56894}}, volume = {{5A-2016}}, year = {{2016}}, }