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

Three-dimensional shock wave distortion in shock-square vortex loop interaction
Three-dimensional shock wave distortion in shock-square vortex loop interaction
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.
0894-1777
85-90
Ukai, Takahiro
b83787a3-b48e-4c83-8ad1-9d6c15ef8a7b
Zare-Behtash, Hossein
74be9b97-cb09-49c6-9f75-7ec58c0dd16c
Kontis, Konstantinos
8e534eab-6495-4dcb-ab48-e2a8906bcd8a
Obayashi, Shigeru
f5569406-1354-4642-82c3-82bf73c6594e
Ukai, Takahiro
b83787a3-b48e-4c83-8ad1-9d6c15ef8a7b
Zare-Behtash, Hossein
74be9b97-cb09-49c6-9f75-7ec58c0dd16c
Kontis, Konstantinos
8e534eab-6495-4dcb-ab48-e2a8906bcd8a
Obayashi, Shigeru
f5569406-1354-4642-82c3-82bf73c6594e

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

Record type: Article

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.

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More information

Accepted/In Press date: 26 June 2016
e-pub ahead of print date: 26 June 2016
Published date: 7 July 2016

Identifiers

Local EPrints ID: 490943
URI: http://eprints.soton.ac.uk/id/eprint/490943
ISSN: 0894-1777
PURE UUID: bea60316-0dd3-4c7a-acdf-b8598b04ff91
ORCID for Hossein Zare-Behtash: ORCID iD orcid.org/0000-0002-4769-4076

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Date deposited: 10 Jun 2024 16:33
Last modified: 11 Jun 2024 02:09

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Contributors

Author: Takahiro Ukai
Author: Hossein Zare-Behtash ORCID iD
Author: Konstantinos Kontis
Author: Shigeru Obayashi

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