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Instability of supersonic ramp flow with intermittent transition to turbulence

Instability of supersonic ramp flow with intermittent transition to turbulence
Instability of supersonic ramp flow with intermittent transition to turbulence
This paper investigates the global instability of supersonic ramp flow at Mach number 4.8 at different Reynolds numbers through direct numerical simulations. It is found that a critical Reynolds number exists for the flow to become globally unstable. Transition to turbulence happens downstream of the ramp with strong intermittency and is due to the breakdown of streaky structures fed by instability from the ramp separation region.
1382-4309
373-378
Springer
Zhang, Kangping
3d0b3b18-bbd0-4992-820b-afa00a009f18
Sandham, Neil
0024d8cd-c788-4811-a470-57934fbdcf97
Hu, Zhiwei
dd985844-1e6b-44ba-9e1d-fa57c6c88d65
Grigoriadis, D.
Geurts, B.
Kuerten, H.
Frohlich, J.
Armenio, V.
Zhang, Kangping
3d0b3b18-bbd0-4992-820b-afa00a009f18
Sandham, Neil
0024d8cd-c788-4811-a470-57934fbdcf97
Hu, Zhiwei
dd985844-1e6b-44ba-9e1d-fa57c6c88d65
Grigoriadis, D.
Geurts, B.
Kuerten, H.
Frohlich, J.
Armenio, V.

Zhang, Kangping, Sandham, Neil and Hu, Zhiwei (2018) Instability of supersonic ramp flow with intermittent transition to turbulence. In, Grigoriadis, D., Geurts, B., Kuerten, H., Frohlich, J. and Armenio, V. (eds.) Direct and Large-Eddy Simulation X. (ERCOFTAC, , (doi:10.1007/978-3-319-63212-4_47), 24) Cham. Springer, pp. 373-378. (doi:10.1007/978-3-319-63212-4_47).

Record type: Book Section

Abstract

This paper investigates the global instability of supersonic ramp flow at Mach number 4.8 at different Reynolds numbers through direct numerical simulations. It is found that a critical Reynolds number exists for the flow to become globally unstable. Transition to turbulence happens downstream of the ramp with strong intermittency and is due to the breakdown of streaky structures fed by instability from the ramp separation region.

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Accepted/In Press date: 19 February 2017
e-pub ahead of print date: 8 October 2017
Published date: 2018

Identifiers

Local EPrints ID: 415691
URI: http://eprints.soton.ac.uk/id/eprint/415691
ISSN: 1382-4309
PURE UUID: 6675e88e-03d2-4db8-853e-e1b87307088b
ORCID for Neil Sandham: ORCID iD orcid.org/0000-0002-5107-0944

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Date deposited: 20 Nov 2017 17:30
Last modified: 20 Jul 2019 01:10

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