Numerical-simulation of boundary-layer-transition at Mach 2
Numerical-simulation of boundary-layer-transition at Mach 2
The linear and early nonlinear stages of boundary-layer transition at free-stream Mach numberM ?==2.0 are investigated by direct numerical simulation of the compressible Navier-Stokes equations. Results from simulations with a large computational box and small-amplitude random initial conditions are compared with linear stability theory. The growth rates of oblique waves are reproduced correctly. Two-dimensional waves show a growth that is modulated in time, indicating the presence of an extra unstable mode which moves supersonically relative to the free stream. Further simulations are conducted to investigate the nonlinear development of two- and three-dimensional disturbances The transition due to oblique disturbance waves is the most likely cause of transition at this Mach number, and is found to lead to the development of strong streamwise vortices
371-375
Sandham, N.D.
0024d8cd-c788-4811-a470-57934fbdcf97
Adams, N.A.
9cfa9735-1a82-4eed-a996-7b0feefeacc1
June 1993
Sandham, N.D.
0024d8cd-c788-4811-a470-57934fbdcf97
Adams, N.A.
9cfa9735-1a82-4eed-a996-7b0feefeacc1
Sandham, N.D. and Adams, N.A.
(1993)
Numerical-simulation of boundary-layer-transition at Mach 2.
Applied Scientific Research, 51 (1-2), .
(doi:10.1007/BF01082563).
Abstract
The linear and early nonlinear stages of boundary-layer transition at free-stream Mach numberM ?==2.0 are investigated by direct numerical simulation of the compressible Navier-Stokes equations. Results from simulations with a large computational box and small-amplitude random initial conditions are compared with linear stability theory. The growth rates of oblique waves are reproduced correctly. Two-dimensional waves show a growth that is modulated in time, indicating the presence of an extra unstable mode which moves supersonically relative to the free stream. Further simulations are conducted to investigate the nonlinear development of two- and three-dimensional disturbances The transition due to oblique disturbance waves is the most likely cause of transition at this Mach number, and is found to lead to the development of strong streamwise vortices
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Published date: June 1993
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Local EPrints ID: 72045
URI: http://eprints.soton.ac.uk/id/eprint/72045
ISSN: 0003-6994
PURE UUID: 8c38eb70-2149-4691-b133-ea12575a7b24
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Date deposited: 18 Jan 2010
Last modified: 14 Mar 2024 02:42
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Author:
N.D. Sandham
Author:
N.A. Adams
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