Comparison of three large-eddy simulations of shock-induced
turbulent separation bubbles
Comparison of three large-eddy simulations of shock-induced
turbulent separation bubbles
Three different large-eddy simulation investigations
of the interaction between an impinging oblique shock
and a supersonic turbulent boundary layer are presented. All
simulations made use of the same inflow technique, specifically
aimed at avoiding possible low-frequency interferences
with the shock/boundary-layer interaction system. All simulations
were run on relatively wide computational domains
and integrated over times greater than twenty five times the
period of the most commonly reported low-frequency shock oscillation,
making comparisons at both time-averaged and
low-frequency-dynamic levels possible. The results confirm
previous experimental results which suggested a simple linear
relation between the interaction length and the obliqueshock
strength if scaled using the boundary-layer thickness
and wall-shear stress. All the tested cases show evidences
of significant low-frequency shock motions. At the wall,
energetic low-frequency pressure fluctuations are observed,
mainly in the initial part of interaction.
shock boundary layer interaction, les, low-frequency unsteadiness, separation bubble
469-478
Touber, Emile
0d715527-5254-488a-8ad2-a4829eb89936
Sandham, Neil D.
0024d8cd-c788-4811-a470-57934fbdcf97
December 2009
Touber, Emile
0d715527-5254-488a-8ad2-a4829eb89936
Sandham, Neil D.
0024d8cd-c788-4811-a470-57934fbdcf97
Touber, Emile and Sandham, Neil D.
(2009)
Comparison of three large-eddy simulations of shock-induced
turbulent separation bubbles.
Shock Waves, 19 (6), .
(doi:10.1007/s00193-009-0222-x).
Abstract
Three different large-eddy simulation investigations
of the interaction between an impinging oblique shock
and a supersonic turbulent boundary layer are presented. All
simulations made use of the same inflow technique, specifically
aimed at avoiding possible low-frequency interferences
with the shock/boundary-layer interaction system. All simulations
were run on relatively wide computational domains
and integrated over times greater than twenty five times the
period of the most commonly reported low-frequency shock oscillation,
making comparisons at both time-averaged and
low-frequency-dynamic levels possible. The results confirm
previous experimental results which suggested a simple linear
relation between the interaction length and the obliqueshock
strength if scaled using the boundary-layer thickness
and wall-shear stress. All the tested cases show evidences
of significant low-frequency shock motions. At the wall,
energetic low-frequency pressure fluctuations are observed,
mainly in the initial part of interaction.
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Submitted date: December 2009
Published date: December 2009
Keywords:
shock boundary layer interaction, les, low-frequency unsteadiness, separation bubble
Organisations:
Aerodynamics & Flight Mechanics
Identifiers
Local EPrints ID: 69789
URI: http://eprints.soton.ac.uk/id/eprint/69789
ISSN: 1432-2153
PURE UUID: c8ec8c25-2ee1-413f-8c5c-cd3a1e74a8f8
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Date deposited: 03 Dec 2009
Last modified: 14 Mar 2024 02:42
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Contributors
Author:
Emile Touber
Author:
Neil D. Sandham
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