Author(s): M. H. Garcia; F. A. Bombardelli; M. Guala; M. E. Caisley
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Keywords: Canoe chutes; 3-D flows; Free-surface flows; Turbulence
Abstract: Recent professional requirements to hydraulic engineers have driven the attention to nonconventional structures, for which the theory, and the experimental evidence, has yet to be developed. One of those structures is the canoe chute. A canoe chute is a series of rapids and pools creating a gradual descent from the pool upstream of low-head dams, to the river, at the toe of those dams. Each rapid forces a turbulent surface jet that may generate a hydraulic jump or a standing wave, when it enters the slower waters of a pool. No systematic scientific guidelines for the design of canoe chutes are reported in the available literature. At the same time, remarkably few works have studied the turbulence in this type of particularly complex flow. This paper is therefore devoted to facilitate the design of canoe chutes through the analysis of proposed momentum equations and turbulence, via the physical modeling of the hydraulic structure.
Year: 2003