Experimental investigation of impinging shock – cavity interactions with upstream transverse jet injection

Zare-Behtash, H. , Lo, K. H., Ukai, T., Kontis, K. and Obayashi, S. (2014) Experimental investigation of impinging shock – cavity interactions with upstream transverse jet injection. Transactions of the Japan Society for Aeronautical and Space Sciences, Aerospace Technology Japan, 12(ists29), pp. 57-62. (doi:10.2322/tastj.12.Pe_57)

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Publisher's URL: http://dx.doi.org/10.2322/tastj.12.Pe_57

Abstract

Mixing between the injected fuel and high speed free stream air is challenging at supersonic speeds. Placing cavities downstream of injection holes or slots addresses the problem of flame holding and stabilisation, however there are still open questions related to mixing enhancement, uniformity and efficiency. The present study examines experimentally the flow field interactions due to a transverse jet - cavity combination with shock impingement at supersonic speeds using PIV, Schlieren photography, and oil flow surface visualisation. The oblique shock lifts the shear layer over the cavity and combined with the instabilities generated by the transverse jet injection creates a highly complicated flowfield with numerous vortical structures. The interaction between the oblique shock and the jet leads to a relatively uniform velocity distribution within the cavity. The lifting of the shear layer is also believed to reduce the drag created by the cavity.

Item Type:Articles (Editorial)
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Ukai, Dr Takahiro and Kontis, Professor Konstantinos and Lo, Dr Kin Hing and Zare-Behtash, Dr Hossein
Authors: Zare-Behtash, H., Lo, K. H., Ukai, T., Kontis, K., and Obayashi, S.
Subjects:Q Science > Q Science (General)
Q Science > QC Physics
College/School:College of Science and Engineering > School of Engineering > Aerospace Sciences
Journal Name:Transactions of the Japan Society for Aeronautical and Space Sciences, Aerospace Technology Japan
Publisher:Japan Society for Aeronautical and Space Sciences
ISSN:1884-0485
Copyright Holders:Copyright © 2014 Japan Society for Aeronautical and Space Sciences
First Published:First published in Transactions of the Japan Society for Aeronautical and Space Sciences, Aerospace Technology Japan 12(ists29):57-62
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher.

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