Backward Flow Velocities of Submerged Hydraulic Jumps
Publication: Journal of Hydraulic Engineering
Volume 127, Issue 6
Abstract
This paper describes an experimental investigation of submerged hydraulic jumps forming downstream of overflow structures. Submergence happens when the hydrological tailwater depth in a channel exceeds the jump's subcritical sequent depth. It is a common occurrence, particularly with low overflow structures. The jump may produce a vortex having significant countercurrent free-surface velocities. This phenomenon is held responsible for frequent personal injury accidents of unwary recreationists, hence its appellation of “drowning machine.” Experimental results, supported by analytical reasoning, are presented that quantify these dangerously high velocities for all hydraulic situations.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Chow, V. T. ( 1959). Open-channel hydraulics, McGraw-Hill, New York.
2.
Fan, J. J. ( 1993). “Submerged hydraulic jumps at overflow structures.” M.A.Sc. thesis, Department of Mechanical Engineering, University of Toronto, Toronto, Ontario, Canada.
3.
Leutheusser, H. J. ( 1988). “Dam safety, yes. But what about safety at dams?” Proc., 1988 Nat. Conf., Hydr. Div., ASCE, Colorado Springs, Colo., 1091–1096.
4.
Leutheusser, H. J., and Birk, W. M. (1991). “Drownproofing of low overflow structures.”J. Hydr. Engrg., ASCE, 117(2), 205–213.
5.
Leutheusser, H. J., and Fan, J. J. ( 1995). “Transcritical weir flow.” Zeitschrift fuer angewandte Mathematik und Mechanik (ZAMM), 75(SI), S343–S344.
6.
Rao, N. S., and Rajaratnam, N. (1963). “The submerged hydraulic jump.”J. Hydr. Div., ASCE, 89(1), 139–162.
7.
The Drowning Machine. ( 1980). Borland-Coogan Filmspace Productions, video.
Information & Authors
Information
Published In
History
Received: Feb 7, 2000
Published online: Jun 1, 2001
Published in print: Jun 2001
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.