A new model for damping controlled fluidelastic instability in heat exchanger tube arrays
Citation:
Meskell, C., A new model for damping controlled fluidelastic instability in heat exchanger tube arrays , Proc. IMechE Part A: Journal of Power and Energy, 223, 4, 2009, 361-368Download Item:
Abstract:
Heat exchnager tube arrays are susceptible to damage due to flow-induced vibration, with
fluidelastic instability the potnetially the most destructive mechanism. 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 without the need to calibrate the
model with experimental data. The resulting function is found to compare well with the first
and second order empirical approximations. 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 may well form
part of the underlying mechanism responsible for damping controlled fluidelastic instability,
as previously proposed.
Author's Homepage:
http://people.tcd.ie/cmeskellDescription:
PUBLISHED
Author: MESKELL, CRAIG
Type of material:
Journal ArticleSeries/Report no:
Proc. IMechE Part A: Journal of Power and Energy;223;
4;
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