Turbulent spot/separation bubble interactions in a spatially evolving supersonic boundary-layer flow
Turbulent spot/separation bubble interactions in a spatially evolving supersonic boundary-layer flow
The growth and breakdown of localised disturbances into a turbulent spot in a Mach 2 boundary-layer flow have been investigated by direct numerical simulation. In particular, the interaction of a turbulent
spot with a shock-induced separation bubble is studied. The primary vortex structures triggered by the injected low momentum fluid and the metamorphosis of the hairpin structures into a turbulent spot are
clearly identified in the present study. The spot-separation bubble interaction is found to enhance the breakdown of the hairpin structures i.e. is capable of advancing the transition process. A substantial
increase in the lateral spreading of the spot is observed due to the spot/bubble interaction. Locally averaged profiles of the flow quantities within the spot show behaviour similar to developed turbulent flows.
1-15
Krishnan, L.
4eb5cfc3-d3e2-474d-a63b-e1f80de54bf6
Sandham, N.D.
0024d8cd-c788-4811-a470-57934fbdcf97
2004
Krishnan, L.
4eb5cfc3-d3e2-474d-a63b-e1f80de54bf6
Sandham, N.D.
0024d8cd-c788-4811-a470-57934fbdcf97
Krishnan, L. and Sandham, N.D.
(2004)
Turbulent spot/separation bubble interactions in a spatially evolving supersonic boundary-layer flow.
The RTO AVT Specialists’ Meeting on “Enhancement of NATO Military Flight Vehicle Performance by Management of Interacting Boundary Layer Transition and Separation”, Prague, Czech Republic.
03 - 06 Oct 2004.
.
Record type:
Conference or Workshop Item
(Other)
Abstract
The growth and breakdown of localised disturbances into a turbulent spot in a Mach 2 boundary-layer flow have been investigated by direct numerical simulation. In particular, the interaction of a turbulent
spot with a shock-induced separation bubble is studied. The primary vortex structures triggered by the injected low momentum fluid and the metamorphosis of the hairpin structures into a turbulent spot are
clearly identified in the present study. The spot-separation bubble interaction is found to enhance the breakdown of the hairpin structures i.e. is capable of advancing the transition process. A substantial
increase in the lateral spreading of the spot is observed due to the spot/bubble interaction. Locally averaged profiles of the flow quantities within the spot show behaviour similar to developed turbulent flows.
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Published date: 2004
Venue - Dates:
The RTO AVT Specialists’ Meeting on “Enhancement of NATO Military Flight Vehicle Performance by Management of Interacting Boundary Layer Transition and Separation”, Prague, Czech Republic, 2004-10-03 - 2004-10-06
Identifiers
Local EPrints ID: 23782
URI: http://eprints.soton.ac.uk/id/eprint/23782
PURE UUID: 5f49e168-82d8-4d2f-b900-ade36caa1f7a
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Date deposited: 01 Jun 2006
Last modified: 12 Dec 2021 03:05
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Contributors
Author:
L. Krishnan
Author:
N.D. Sandham
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