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Passive control of 3D adaptive shock control bumps using a sealed cavity

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Title: Passive control of 3D adaptive shock control bumps using a sealed cavity
Authors: Gramola, M
Bruce, P
Santer, M
Item Type: Journal Article
Abstract: This paper presents a Fluid-Structure-Interaction study of a novel passive adaptive shock control bump concept. A flexible plate, clamped on all sides and placed above a sealed cavity, was tested beneath a Mach 1.4 normal shock in the Imperial College London supersonic wind tunnel. The plate was actuated into the shape of a 3D shock control bump by passively controlling the cavity pressure through an array of breather holes. Preliminary experiments were performed with active control of cavity pressure (via a vacuum tank) at Mach 1.4 and 2 to illustrate the potential of this concept. Full-field surface measurement techniques, namely photogrammetry and pressure sensitive paint, were employed in addition to static pressure tappings and schlieren photography. Results confirmed that cavity pressure plays a key role in determining the aerostructural behaviour of the flexible plate. In addition, it was found that carefully placed breather holes allowed the plate to deform into a 3D shock control bump when a shock was on the flexible region and remain flat otherwise. This shows significant potential for improving the off-design behaviour of adaptive shock control bumps.
Issue Date: Jul-2022
Date of Acceptance: 18-Apr-2022
URI: http://hdl.handle.net/10044/1/97107
DOI: 10.1016/j.jfluidstructs.2022.103580
ISSN: 0889-9746
Publisher: Elsevier
Start Page: 1
End Page: 19
Journal / Book Title: Journal of Fluids and Structures
Volume: 112
Copyright Statement: © 2022 Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
Keywords: Fluids & Plasmas
09 Engineering
Publication Status: Published
Online Publication Date: 2022-05-25
Appears in Collections:Aeronautics
Faculty of Engineering

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