Gate Vibrations due to Unstable Flow Separation
Publication: Journal of Hydraulic Engineering
Volume 116, Issue 3
Abstract
The unsteady load and vibration behavior of vertical‐lift gates was investigated for different gate‐bottom geometries and disharge conditions in an open channel and at a conduit inlet. In all cases, vibrations occurred in specific ranges of a dimensionless velocity parameter whenever the flow fluctuated between complete separation and reattachment at the gate bottom. The excitation mechanism was attributed to the combined effect of shear‐layer instabilities and motion‐induced vortices shed at the leading edge of the gate bottom. Many puzzling features of in‐flow and cross‐flow vibration of gates with flow underneath can thus be clarified. In addition, it is shown that the slope of the mean lift curve acting on the gate bottom provides an effective means of predicting with reasonable accuracy the critical range of gate openings with respect to potential gate vibration. The prediction method is illustrated in a practical case.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Hardwick, J. D. (1974). “Flow‐induced vibration of vertical‐lift gate.” J. Hydr. Div., ASCE, 100(5), 631–644.
2.
Hardwick, J. D., Kenn, J. J., and Mee, W. T. (1980). “Gate vibration at El Chocon hydro‐power scheme, Argentinia.” Proc., Int. Symp. on Practical Experiences with Flow‐Induced Vibrations, Int. Assoc., for Hydr. Res. and the Int. Union of Theoretical and Appl. Mech., Karlsruhe, West Germany, Springer Verlag, 439–444.
3.
Jongeling, T. H. G. (1988). “Flow‐induced self‐exited in‐flow vibrations of gate plates.” J. Fluids and Structures, Academic Press, London, England, 2(6), 541–566.
4.
Kanne, S. (1989). “Vibration of a vertical‐lift gate with variable bottom geometry,” thesis presented to the University of Karlsruhe, at Karlsruhe, Federal Republic of Germany, in partial fulfillment of the requirements for the degree of Master of Science (in German).
5.
Kolkman, P. A. (1983). “Gate vibrations,” Developments in Hydraulic Engineering, Vol. 2, P. Novak, ed., Elsevier Applied Science Publications, Essex, England.
6.
Kolkman, P. A., and Vrijer, A. (1977). “Gate edge suction as a cause of self‐exciting vertical vibrations.” Proc., 17th Congress of the Int. Assoc., for Hydr. Res., Baden‐Baden, Federal Republic of Germany, Vol. 4.
7.
Komatsu, S., and Kobayashi, H. (1980). “Vortex‐induced oscillation of bluff cylinders.” J. Wind Engrg. and Industrial Aerodynamics, Amsterdam, The Netherlands, 6(Nov.), 335–362.
8.
Martin, W. W., Naudascher, E., and Padmanabhan, M. (1975). “Fluid‐dynamic excitation involving flow instability.” J. Hydr. Div., ASCE, 101(6), 681–698.
9.
Mueller, O. (1933). “Schwingungsuntersuchungen an unterstroemten Wehren.” Mit‐teilungen der Preussischen Versuchungsanstaltfuer Wasserbau, Berlin, Germany, No. 13.
10.
Nakamura, Y., and Nakashima, M. (1986). “Vortex excitation of prisms with elongated rectangular, H‐ and T‐cross‐sections.” J. Fluid Mech., 163, 149–169.
11.
Nakamura, Y. (1979). “On the aerodynamic mechanism of torsional flutter of bluff structures.” J. Sound and Vibration, 67(2), 471–499.
12.
Naudascher, E. (1967). “From flow instability to flow induced vibration.” J. Hydr. Div., ASCE, 93(4), 15–40.
13.
Naudascher, E. (1988). “Flow‐induced loading and vibration of gates.” Proc., Int. Symp. on Hydr. for High Dams, Invited Lecture, Beijing, China.
14.
Perkins, J. A. (1963). “Model investigations of the vibrations of a vertical‐lift sluice gate.” Proc., 10th Congress, Int. Assoc. for Hydr. Res., London, England, Paper 3.2.
15.
Rockwell, D. O., and Naudascher, E. (1974). “Self‐sustained oscillations of impinging free shear layers.” Annual Review of Fluid Mech., Vol. 11.
16.
Scanlan, R. H., and Tomko, J. J. (1971). “Airfoil and bridge deck flutter derivatives.” J. Engrg. Mech. Div., ASCE, 97(6), 1717–1737.
17.
Thang, N. D., and Naudascher, E. (1986). “Vortex‐excited vibrations of underflow gates.” J. Hydr. Res., 24(2), 133–151.
18.
Thang, N. D., and Naudascher, E. (1986). “Self‐excited vibrations of vertical‐lift gates.” J. Hydr. Res., 5(5), 391–404.
19.
Thang, N. D., Lin, Q. H., and Naudascher, E. (1987). “Flexural streamwise vibration of gate plates under vortex action.” Proc., Int. Conf. on Flow‐Induced Vibrations, British Hydr. Res. Assoc., Bowness‐on‐Windermere, England.
20.
“Vibrations and pressure‐cell tests, flood‐control intake gates, Fort Randall Dam, Missouri River, South Dakota.” (1956). Tech. Rept. Nr.2485, U.S. Corps of Engrs., Waterways Experimental Station, Vicksburg, Miss.
Information & Authors
Information
Published In
Copyright
Copyright © 1990 ASCE.
History
Published online: Mar 1, 1990
Published in print: Mar 1990
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.