The University of Southampton
University of Southampton Institutional Repository

Two-dimensional unsteadiness map of oblique shock wave/boundary layer interaction with sidewalls

Two-dimensional unsteadiness map of oblique shock wave/boundary layer interaction with sidewalls
Two-dimensional unsteadiness map of oblique shock wave/boundary layer interaction with sidewalls
The low-frequency unsteadiness of oblique shock wave/boundary layer interactions (SBLIs) has been investigated using large-eddy simulation (LES) and high-frequency pressure measurements from experiments. Particular attention has been paid to off-centreline behaviour: the LES dataset was generated including sidewalls, and experimental pressure measurements were acquired across the entire span of the reflected shock foot. The datasets constitute the first maps of low-frequency unsteadiness in both streamwise and spanwise directions. The results reveal that significant low-frequency shock motion (with ) occurs away from the centreline, along most of the central separation shock and in the corner regions. The most powerful low-frequency unsteadiness occurs off-centre, likely due to the separation shock being strengthened by shocks arising from the swept interactions on the sidewalls. Both simulation and experimental results exhibit asymmetry about the spanwise centre. In simulations, this may be attributed to a lack of statistical convergence; however, the fact that this is also seen in experiments is indicative that some SBLIs may exhibit some inherent asymmetry across the two spanwise halves of the separation bubble. There is also significant low-frequency power in the corner separations. The relation of the unsteadiness in the corner regions to that in the centre is investigated by means of two-point correlations: a key observation is that significant correlation does not extend across the attached flow channel between the central and corner separations.
0022-1120
Rabey, P.K.
47be4146-af28-42dc-80af-2353935c25fd
Jammy, S.P.
5267fe44-6c22-473c-b9f0-8e1df884fada
Bruce, P.J.K.
0a9c124b-87de-40c0-ba3a-a4bff7f444ff
Sandham, N.D.
0024d8cd-c788-4811-a470-57934fbdcf97
Rabey, P.K.
47be4146-af28-42dc-80af-2353935c25fd
Jammy, S.P.
5267fe44-6c22-473c-b9f0-8e1df884fada
Bruce, P.J.K.
0a9c124b-87de-40c0-ba3a-a4bff7f444ff
Sandham, N.D.
0024d8cd-c788-4811-a470-57934fbdcf97

Rabey, P.K., Jammy, S.P., Bruce, P.J.K. and Sandham, N.D. (2019) Two-dimensional unsteadiness map of oblique shock wave/boundary layer interaction with sidewalls. Journal of Fluid Mechanics, 871.

Record type: Article

Abstract

The low-frequency unsteadiness of oblique shock wave/boundary layer interactions (SBLIs) has been investigated using large-eddy simulation (LES) and high-frequency pressure measurements from experiments. Particular attention has been paid to off-centreline behaviour: the LES dataset was generated including sidewalls, and experimental pressure measurements were acquired across the entire span of the reflected shock foot. The datasets constitute the first maps of low-frequency unsteadiness in both streamwise and spanwise directions. The results reveal that significant low-frequency shock motion (with ) occurs away from the centreline, along most of the central separation shock and in the corner regions. The most powerful low-frequency unsteadiness occurs off-centre, likely due to the separation shock being strengthened by shocks arising from the swept interactions on the sidewalls. Both simulation and experimental results exhibit asymmetry about the spanwise centre. In simulations, this may be attributed to a lack of statistical convergence; however, the fact that this is also seen in experiments is indicative that some SBLIs may exhibit some inherent asymmetry across the two spanwise halves of the separation bubble. There is also significant low-frequency power in the corner separations. The relation of the unsteadiness in the corner regions to that in the centre is investigated by means of two-point correlations: a key observation is that significant correlation does not extend across the attached flow channel between the central and corner separations.

Text
Two-dimensional unsteadiness map of - Accepted Manuscript
Restricted to Repository staff only until 24 November 2019.
Request a copy

More information

Accepted/In Press date: 7 May 2019
e-pub ahead of print date: 24 May 2019
Published date: 25 July 2019

Identifiers

Local EPrints ID: 432117
URI: https://eprints.soton.ac.uk/id/eprint/432117
ISSN: 0022-1120
PURE UUID: ddde4222-04b0-4456-9fa5-dd6086aa1dc3
ORCID for S.P. Jammy: ORCID iD orcid.org/0000-0002-8099-8573
ORCID for N.D. Sandham: ORCID iD orcid.org/0000-0002-5107-0944

Catalogue record

Date deposited: 02 Jul 2019 16:30
Last modified: 30 Jul 2019 00:37

Export record

Contributors

Author: P.K. Rabey
Author: S.P. Jammy ORCID iD
Author: P.J.K. Bruce
Author: N.D. Sandham ORCID iD

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of https://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×