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Flow and pressure drop fluctuations in a vertical tube subject to low frequency oscillations

Pendyala, Rajashekhar and Jayanti, Sreenivas and A R, Balakrishnan (2008) Flow and pressure drop fluctuations in a vertical tube subject to low frequency oscillations. [Citation Index Journal]

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Abstract

Heat transfer and other equipment mounted on off-shore platforms may be subjected to lowfrequency oscillations. The effect of these oscillations, typically in the frequency range of 0.1–1 Hz, on the flow rate and pressure drop in a vertical tube has been studied experimentally in the present work. A 1.75 m-long vertical tube of inner diameter 0.016m was mounted on a plate and the whole plate was subjected to oscillations in the vertical plane using a mechanical simulator capable of providing low frequency oscillations in the range of 8–30 cycles/min at an amplitude of 0.125 m. The effect of the oscillations on the flow rate and the pressure drop has been measured systematically in the Reynolds number range 500–6500. The induced flow rate fluctuations were found to be dependent on the Reynolds number with stronger fluctuations at lower Reynolds numbers. The effective friction factor, based on the mean pressure drop and the mean flow rate, was also found to be higher than expected. Correlations have been developed to quantify this Reynolds number dependence.

Item Type:Citation Index Journal
Subjects:T Technology > T Technology (General)
T Technology > TA Engineering (General). Civil engineering (General)
Academic Subject One:Fluid Flow
Academic Subject Two:Heat Transfer
Departments / MOR / COE:Departments > Chemical Engineering
Mission Oriented Research > Energy
ID Code:10861
Deposited By: Dr Rajashekhar Pendyala
Deposited On:16 Dec 2013 23:48
Last Modified:16 Dec 2013 23:48

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