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Frequency of the Karman Vortex Streets in Tube Banks
Published online by Cambridge University Press: 04 July 2016
Extract
In the note “Aerodynamically induced vibration in coolers”, by D. G. Mabey (pp 876-7, December 1965 Journal), the results of Grotz and Arnold concerning the frequency of the Karman vortex streets in tube banks, such as in heat exchangers, are mentioned, as is also the law of the linear relation between f(T—d)/V and (2T-L)/d, as found by Putnam, where
f frequency of vortex shedding
T transverse distance
L longitudinal distance between tubes
d outer diameter of tube
V mean stream velocity based on minimum flow area between the tubes
This linear relation has no theoretical justification and cannot be accurate, as is admitted by the author cited. A further investigation on a theoretical basis seems to be necessary.
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- Copyright © Royal Aeronautical Society 1967
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