Experimental study into the flow physics of three-dimensional shock control bumps
File(s)
Accepted version
Author(s)
Bruce, PJK
Babinsky, H
Type
Journal Article
Abstract
This paper describes a fundamental experimental study of the flow structure around a single three-dimensional (3-D) transonic shock control bump (SCB) mounted on a flat surface in a wind tunnel. Tests have been carried out with a Mach 1.3 normal shock wave located at a number of stream-wise positions relative to the SCB. A range of experimental techniques have been used to study details of the flow. The results of the work build on the findings of previous researchers and shed new light on the flow physics of 3-D SCBs. It is found that span-wise pressure gradients across the SCB ramp affect the magnitude and uniformity of flow-turning generated by the bump, which can impact on the span-wise propagation of the quasi-2-D shock structure produced by a 3-D SCB. At the bump crest, vortices can form if the pressure on the crest is significantly lower than at either side of the bump. The trajectories of these vortices, which are relatively weak, are strongly influenced by any span-wise pressure gradients across the bump tail. A significant difference between 2-D and 3-D SCBs highlighted by the study is the impact of span-wise pressure gradients on 3-D SCB performance. The magnitude
of these span-wise pressure gradients is determined largely by SCB geometry and shock position.
of these span-wise pressure gradients is determined largely by SCB geometry and shock position.
Date Issued
2012
Citation
Journal of Aircraft: devoted to aeronautical science and technology, 2012
ISSN
0021-8669
Publisher
American Institute of Aeronautics and Astronautics
Start Page
1222
End Page
1233
Journal / Book Title
Journal of Aircraft: devoted to aeronautical science and technology
Volume
49
Issue
5
Copyright Statement
Copyright © 2011 by the
American Institute of Aeronautics and Astronautics, Inc. All rights reserved.
American Institute of Aeronautics and Astronautics, Inc. All rights reserved.
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=000309736200004&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Publication Status
Accepted
Coverage Spatial
Orlando, FL