Propagation of Pressure Waves in Two-Component Bubbly Flow in Horizontal Pipes
Publication: Journal of Hydraulic Engineering
Volume 137, Issue 6
Abstract
The propagation of pressure waves in two-component bubbly flow was analytically and experimentally investigated. An analysis is presented that accounts for the effects attributable to liquid compressibility, pipe elasticity, and temperature rise across pressure waves. Analytical results indicate that the effects of liquid compressibility and pipe wall elasticity are important at low gas content, although the effect of temperature change is generally negligible. Pressure waves were generated in the laboratory by rapid closure of a valve at the downstream end of a horizontal pipe. The experimental results indicate that there were two major pressure surges generated by valve closure; the first was attributable to stoppage of the two-phase mixture at the valve, and the second attributable to the arrest of the liquid column at the upstream end of the mixing device. The transient flow model provides a satisfactory prediction of the initial pressure rise at the valve and the average velocity of the initial pressure waves.
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Acknowledgments
The author wishes to thank Prof. Ray A. A. Bryant for his guidance throughout the course of this project, which was carried out at School of Mechanical and Industrial Engineering, University of New South Wales, Sydney, Australia. He also wishes to thank Mr. Richard B. Frost and Mr. Jim Beck for their assistance during the construction and setting up of the experimental test apparatus.
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 137 • Issue 6 • June 2011
Pages: 668 - 678
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Jan 20, 2010
Accepted: Oct 19, 2010
Published online: May 16, 2011
Published in print: Jun 1, 2011
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