Three-dimensional shock wave distortion in shock-square vortex loop interaction

Ukai, T., Zare-Behtash, H. , Kontis, K. and Obayashi, S. (2016) Three-dimensional shock wave distortion in shock-square vortex loop interaction. Experimental Thermal and Fluid Science, 79, pp. 85-90. (doi:10.1016/j.expthermflusci.2016.06.028)

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Abstract

Understanding of the three-dimensional shock wave-vortex loop interaction phenomena plays a key role in noise reduction. This study focuses on the three-dimensional shock wave distortion and propagation phenomena in a near-field supersonic jet. Shock-square vortex loop interaction was experimentally investigated in a square cross-sectional open-end shock wave generating tube at an incident shock Mach number of 1.39 ± 0.05. A square vortex loop impinged on a reflected shock wave from a wall located in front of the nozzle end. The planar reflected shock wave transforms into either a concave or convex distorted shape due to the opposing high-speed flow emitted from the nozzle corner. The convex shaped shock wave scatters towards the outside of the vortex loop, whereas the concave one converges towards the centre of the vortex loop. The concave shaped shock wave results in shock wave focusing. In shock-square vortex loop interaction, the shock wave is locally focused along the axis of the nozzle corner.

Item Type:Articles (Editorial)
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Ukai, Dr Takahiro and Kontis, Professor Konstantinos and Zare-Behtash, Dr Hossein
Authors: Ukai, T., Zare-Behtash, H., Kontis, K., and Obayashi, S.
Subjects:Q Science > Q Science (General)
Q Science > QC Physics
T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TJ Mechanical engineering and machinery
College/School:College of Science and Engineering > School of Engineering > Aerospace Sciences
Journal Name:Experimental Thermal and Fluid Science
Publisher:Elsevier
ISSN:0894-1777
Published Online:27 June 2016
Copyright Holders:Copyright © 2016 Elsevier Inc.
First Published:First published in Experimental Thermal and Fluid Science 79: 85-90
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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