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RESEARCH PAPERS

Effect of Void Fraction on Vibrational Behavior of Tubes in Tube Bundle Under Two-Phase Cross Flow

[+] Author and Article Information
H. Y. Lian, G. Noghrehkar, A. M. C. Chan, M. Kawaji

Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Ontario, M5S 1A4, Canada

J. Vib. Acoust 119(3), 457-463 (Jul 01, 1997) (7 pages) doi:10.1115/1.2889745 History: Received January 01, 1993; Revised June 01, 1994; Online February 26, 2008

Abstract

The effects of local two-phase flow parameters on the vibrational behavior of tubes have been studied in an in-line 5 × 20 tube bundle subjected to air-water cross-flow. One of the tubes was flexibly mounted and instrumented for vibration measurement and the others were rigid. Parameters obtained include local void fraction fluctuations, RMS amplitude of void fraction fluctuations, void fraction distributions across the tube bundle, flow regimes based on probability density function of void fraction signals, damping ratio, and tube vibration response as a function of mass flux, void fraction and dynamic pressure. Damping and tube vibration amplitude in two-phase flow have been found to be closely related to the RMS amplitudes of the local void fraction fluctuations and dynamic pressure fluctuations, respectively.

Copyright © 1997 by The American Society of Mechanical Engineers
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