Gate Failure, Numerical And Physical Modelling
At Gouin Dam
Author(s)
L. Carballada, S. Han, M. Lemay, M. Stirbu, G. Holder
& Y. Collin
Abstract
Gouin dam is the main structure on the Saint Maurice river. A gate failure in
2002 prompted this study. Over the years, many modifications and attempts to
correct the problems and obtain smooth operation of the bottom outlets were
carried out, but with limited success. The numerical results gave a good
representation of the flow conditions in the zone of pressure flow before the
separation and free surface flow zone but in this latter regime the results were
less satisfactory. As a result, a new physical hydraulic model was requested and
built. The solution retained has significant advantages when compared to the
previous one. In summary, the numerical simulation, due to the power of a
strong graphics display, allowed a good preliminary evaluation of the problems.
However, a physical model was an essential tool in studying aspects such as airwater
mixture and the free surface instability as well as giving information on the
vibration and cavitation problems associated with the interaction of high velocity
flow and the gate structure. A final solution was found.
Keywords: gates, separation, vibrations, cavitation, dams, sluice, physical and
numerical models.
1 Introduction
Bottom gates are very often located at sites where difficult flow conditions are
present. High pressures and velocity, excessive turbulence and aeration need to
be considered in their design. A poor concept can lead to gate vibrations that can
Keywords
gates, separation, vibrations, cavitation, dams, sluice, physical and
numerical models.
Related Book
Other papers in this volume
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