Jet in crossflow: Experiments on the interaction of flow-structure and cooling efficiency

de Lange, H.C.

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dc.contributor.author	de Lange, H.C.
dc.date.accessioned	2015-04-24T08:04:09Z
dc.date.available	2015-04-24T08:04:09Z
dc.date.issued	2014
dc.description.abstract	Paper presented to the 10th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Florida, 14-16 July 2014.	en_ZA
dc.description.abstract	The effect of imperfections in film-cooling nozzles on the flow fields and cooling effectiveness is studied. Measurements are performed using laser induced fluoresce, particle image velocimetry and thermo-chromic liquid crystal sheets. Different positions, shapes (square, triangular and round) and sizes (5- 25% blockage) of imperfections are used to investigate the role of the nozzle geometry at different velocity ratios (0.15-1.50) with a fixed nozzle angle (37o). Results will show that the position and size of the geometry disturbance are determining factors in the resulting cooling effectiveness, through their effect on the vortex-structures at the nozzle outlet. In some cases, the imperfect holes lead to a significantly improved performance, while in some other cases they deteriorate it.	en_ZA
dc.description.librarian	dc2015	en_ZA
dc.format.extent	11 pages	en_ZA
dc.format.medium	PDF	en_ZA
dc.identifier.citation	de Lange, HC 2014, 'Jet in crossflow: Experiments on the interaction of flow-structure and cooling efficiency', Paper presented to the 10th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Florida, 14-16 July 2014.	en_ZA
dc.identifier.isbn	97817759206873
dc.identifier.uri	http://hdl.handle.net/2263/44754
dc.publisher	International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics	en_ZA
dc.rights	© 2014 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria.	en_ZA
dc.subject	Imperfections in film-cooling	en_ZA
dc.subject	Film-cooling nozzles	en_ZA
dc.subject	Flow fields	en_ZA
dc.subject	Laser induced fluoresce	en_ZA
dc.subject	Particle image velocimetry	en_ZA
dc.subject	Thermo-chromic liquid crystal sheets	en_ZA
dc.subject	Cooling effectiveness	en_ZA
dc.subject	Vortex-structures	en_ZA
dc.title	Jet in crossflow: Experiments on the interaction of flow-structure and cooling efficiency	en_ZA
dc.type	Presentation	en_ZA