Lo, K. H. and Kontis, K. (2017) Supersonic flow over rounded contour bumps with vortex generators or passive longitudinal jets. Experimental Thermal and Fluid Science, 85, pp. 213-228. (doi: 10.1016/j.expthermflusci.2017.03.005)
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137893.pdf - Published Version Available under License Creative Commons Attribution. 4MB |
Abstract
An experimental study has been conducted to investigate the flow characteristics over two rounded contour bumps. Vane-type vortex generators or longitudinal aligned passive by-pass jets were implemented in attempt to achieve wake flow control in rounded contour bumps. According to the results collected from the surface oil flow visualisation experiments, it was observed that the use of both the vane-type vortex generators and the longitudinally aligned passive by-pass jet could reduce the size of the spanwise vortices in the bump valley. In addition, a pair of streamwise horseshoe vortices was observed downstream of the bump crest of the contour bump that equipped with the vane-type vortex generators. From the data collected in the particle image velocimetry measurements, it was found that the use of both the vane-type vortex generators and the longitudinally aligned passive by-pass jet could not reduce the size of the wake region but they could reduce its strength. It is deduced that the two streamwise horseshoe vortices generated by the vane-type vortex generators enhance flow mixing which results in reducing the strength of the wake region. In contrast, blowing passive by-pass jet in the bump valley increases the local flow velocity in order to reduce the strength of the wake region.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Lo, Dr Kin Hing and Kontis, Professor Konstantinos |
| Authors: | Lo, K. H., and Kontis, K. |
| Subjects: | T Technology > TL Motor vehicles. Aeronautics. Astronautics |
| College/School: | College of Science and Engineering > School of Engineering > Autonomous Systems and Connectivity |
| Journal Name: | Experimental Thermal and Fluid Science |
| Publisher: | Elsevier |
| ISSN: | 0894-1777 |
| ISSN (Online): | 1879-2286 |
| Published Online: | 06 March 2017 |
| Copyright Holders: | Copyright © 2017 The Authors |
| First Published: | First published in Experimental Thermal and Fluid Science 2017 85:213-228 |
| Publisher Policy: | Reproduced under a Creative Commons License |
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