The Midi Hydroelectric Company has to carry-out a recalibration of the Petite-Rhue spillway. Actually, its current evacuation capacity is insufficient for safely channeling the flood flow for the dam (millennium flood).The recalibration project was defined following a hydraulic modeling on a physical model. However, the initial project led to reinforcement works on the lock wall on the right bank of the spillway which were more significant than expected, given the estimated heights of the water of the project flood.
The initial project, defined following a hydraulic modeling on a physical model consists of:
ISL’s aim is to study the variants for developing the mounting, with the help of a 3D digital hydraulic modeling using ANSYS CFX, in order to reduce the waterline in the chute. The objective being to avoid strengthening works on the lock wall on the right bank of the spillway.
Two spillway chute developments will be tested:
ISL Engineering is responsible for studying the various options for developing the chute, using 3D digital hydraulic modeling. The different steps of the study are presented below:
Construction of a three-dimensional digital model
Boundary Conditions
Calibration of the model on the initial project of recalibrating the spillway
Study of proposed developments