Automatic control of laminar boundary-layer transition
Automatic control of laminar boundary-layer transition
Interest has recently been renewed in the use of distributed suction for the production of laminar flow over substantial areas of the surface of aircraft wings and engine nacelles. Suction may be most efficiently applied by using a number of independently controllable panels through which fluid is withdrawn. The need to determine the distribution of suction flow rates that results in a given streamwise location of boundary-layer transition with minimum power consumed in providing suction gives rise to a nonlinearly constrained optimization problem. A gradient descent algorithm is shown to be successful in both experimental and numerical studies in determining the optimal suction distribution. We present results of experiments performed on a flat plate in a wind tunnel with two suction panels and an optional pressure gradient. We show that the system successfully maintains the laminar-turbulent transition at a given point and minimizes the amount of suction power required to do so.
85-90
Nelson, P. A.
5c6f5cc9-ea52-4fe2-9edf-05d696b0c1a9
Wright, M. C.M.
b7209187-993d-4f18-8003-9f41aaf88abf
Rioual, J. L.
69f1c285-0a0e-47fb-a37b-5c4f1503d86d
10 January 1997
Nelson, P. A.
5c6f5cc9-ea52-4fe2-9edf-05d696b0c1a9
Wright, M. C.M.
b7209187-993d-4f18-8003-9f41aaf88abf
Rioual, J. L.
69f1c285-0a0e-47fb-a37b-5c4f1503d86d
Nelson, P. A., Wright, M. C.M. and Rioual, J. L.
(1997)
Automatic control of laminar boundary-layer transition.
AIAA Journal, 35 (1), .
(doi:10.2514/2.66).
Abstract
Interest has recently been renewed in the use of distributed suction for the production of laminar flow over substantial areas of the surface of aircraft wings and engine nacelles. Suction may be most efficiently applied by using a number of independently controllable panels through which fluid is withdrawn. The need to determine the distribution of suction flow rates that results in a given streamwise location of boundary-layer transition with minimum power consumed in providing suction gives rise to a nonlinearly constrained optimization problem. A gradient descent algorithm is shown to be successful in both experimental and numerical studies in determining the optimal suction distribution. We present results of experiments performed on a flat plate in a wind tunnel with two suction panels and an optional pressure gradient. We show that the system successfully maintains the laminar-turbulent transition at a given point and minimizes the amount of suction power required to do so.
This record has no associated files available for download.
More information
Published date: 10 January 1997
Additional Information:
Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
Identifiers
Local EPrints ID: 468761
URI: http://eprints.soton.ac.uk/id/eprint/468761
ISSN: 0001-1452
PURE UUID: 883b5a53-c1c8-479b-b084-ef429c5d9a43
Catalogue record
Date deposited: 24 Aug 2022 16:52
Last modified: 17 Mar 2024 02:40
Export record
Altmetrics
Contributors
Author:
J. L. Rioual
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
