NDLI: On the Underlying Fluid Mechanics Responsible for Damping Controlled Fluidelastic Instability in Tube Arrays

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Meskell, Craig
Copyright Year	2005
Abstract	Granger and Paidoussis hypothesized that damping controlled fluidelastic instability is in fact due to the generation and convection of vorticity. In this paper a simple wake model consisting of a convecting vortex sheet is proposed to represent the transient nature of fluidelastic forces present in a tube array. Using this model, the memory function proposed by Granger and Paidoussis has been obtained by numerical integration without the need to calibrate the model with experimental data. The resulting function is found to compare well with the first and second order approximations which were determined empirically. However, the current model does not exhibit the physically unrealistic features of the approximations. Furthermore, the memory function has been combined with experimental data for the static fluid force to produce a prediction of the critical velocity for a range of mass damping parameter. This stability threshold is in reasonable agreement with experimental data. Therefore it is concluded that vorticity transport is in fact the mechanism responsible for damping controlled fluidelastic instability.
Sponsorship	Pressure Vessels and Piping Division
Starting Page	573
Ending Page	581
Page Count	9
File Format	PDF
ISBN	0791841898
DOI	10.1115/PVP2005-71468
e-ISBN	0791837637
Volume Number	Volume 4: Fluid Structure Interaction
Conference Proceedings	ASME 2005 Pressure Vessels and Piping Conference
Language	English
Publisher Date	2005-07-17
Publisher Place	Denver, Colorado, USA
Access Restriction	Subscribed
Subject Keyword	Damping Fluid mechanics Fluids Approximation Stability Vortices Vorticity Wakes Convection Transients (dynamics)
Content Type	Text
Resource Type	Article

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