UNSPECIFIED (2003) Excitation and evolution of waves on an inhomogeneous flexible wall in a mean flow. In: 5th International Symposium on Fluid-Structure Interaction, Aeroelasticity, Flow-Induced Vibration and Noise, NEW ORLEANS, LA, NOV, 2002. Published in: JOURNAL OF FLUIDS AND STRUCTURES, 18 (2). pp. 251-267.

Full text not available from this repository.

Abstract

The excitation of neutrally stable small-amplitude waves in a system comprising uniform flow over a flexible wall is studied. Linear theory and numerical simulation are used. A feature of wave excitation in such systems is that distinct amplitude ratios exist when more than one wave is present. An amplitude-ratio equation is first derived for the two waves excited directly by oscillatory excitation applied to a spatially homogeneous plate-spring flexible wall. Thereafter, a second amplitude-ratio equation is derived for waves on a wall with spatially varying foundation-spring stiffness coefficient. In this case, waves beyond a region of changing flexibility are continuously excited by waves propagating through the region of change. Alternatively, it can be considered that an incoming wave evolves into the outgoing wave that emerges from the region of changing wall flexibility. Both energy-flux and WKB methods are used to derive the final amplitude-ratio equation. The theory holds for both upstream- and downstream-propagating waves. It is shown, inter alia, that the waves on either side of the region of slowly changing wall properties are well-described by the dispersion equation based upon local wall properties. Finally, the case of waves incident upon a region of rapidly changing wall properties is simulated and discussed. (C) 2003 Elsevier Ltd. All rights reserved.

Item Type:	Conference Item (UNSPECIFIED)
Subjects:	T Technology > TJ Mechanical engineering and machinery
Journal or Publication Title:	JOURNAL OF FLUIDS AND STRUCTURES
Publisher:	ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD
ISSN:	0889-9746
Date:	September 2003
Volume:	18
Number:	2
Number of Pages:	17
Page Range:	pp. 251-267
Identification Number:	10.1016/j.jfluidstructs.2003.07.003
Publication Status:	Published
Title of Event:	5th International Symposium on Fluid-Structure Interaction, Aeroelasticity, Flow-Induced Vibration and Noise
Location of Event:	NEW ORLEANS, LA
Date(s) of Event:	NOV, 2002
URI:	http://wrap.warwick.ac.uk/id/eprint/9190

Data sourced from Thomson Reuters' Web of Knowledge

Request changes to a record

Actions (login required)

View Item