Observations of Air–Water Interaction in a Rapidly Filling Horizontal Pipe
Publication: Journal of Hydraulic Engineering
Volume 128, Issue 6
Abstract
This paper presents the results of an observational study related to the behavior of drainage sewers under conditions of hydraulic overloading. Specifically, the investigation focuses on the interaction of water and trapped air in surcharging drainage and pressurized pipeline systems, by studying the air–water flow behavior in a rapidly filling horizontal pipe. Air–water interface patterns, air entrainment, and air release through an orifice at the pipe end are documented photographically. Synchronously recorded pressure traces are also presented to illustrate the relation between the air–water phase evolution and the pressure oscillation patterns. Depending on the air release rate of the orifice, there are three types of pressure oscillation behavior, each corresponding to a particular behavior of the air–water interface in the rapidly filling horizontal pipe.
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References
Cardle, J. A., Song, C. C. S., and Yuan, M.(1989). “Measurements of mixed transient flows.” J. Hydraul. Eng. , 115(2), 169–182.
Guo, Q., and Song, C. C. S.(1990). “Surging in urban storm drainage systems.” J. Hydraul. Eng., 116(12), 1523–1537.
Li, J., and McCorquodale, A.(1999). “Modeling mixed flow in storm sewers.” J. Hydraul. Eng., 125(11), 1170–1180.
Zhou, F. (2000). “Effects of trapped air on flow transients in rapidly filling sewers.” PhD thesis, Dept. of Civil and Environmental Engineering, Univ. of Alberta, Edmonton, Alta., Canada, 168 pp.
Zhou, F., Hicks, F., and Steffler, P. (2002). “Transient flow in a rapid filled horizontal pipe with trapped air.” J. Hydraul. Eng. (in press).
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Copyright © 2002 American Society of Civil Engineers.
History
Received: Jun 12, 2000
Accepted: Dec 9, 2001
Published online: May 15, 2002
Published in print: Jun 2002
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