Scale effect on Ogee Spillway Hydraulically Performance(2013-2014)
2014
Saneie, Mojtaba | Karami, Hasan | Aliverdloo, Mahdi | Pashootani, Parviz
Structures that flow into the overflow correctly and securely to the bottom of the dam transfers until the dam could flood the stability and through put guarantee. Ogee spillway crest nonlinear curvature in plan and in a wide Sayt than the spillway crest straight, more flow will pass. Therefore, this type of spillways low hydraulic loads and require less space than the type of plan spillways, economic structures such as that its application - the various aspects of development can be. These spillways due to the lack of standard geometry they are usually of a physical model designed to overflow in laboratory performance and a good design will help rebuild . One of the problems in studying the effects of scale models will occur is. The possibility of lowering the viscosity and the surface tension force is not. In this study, the physical model of the three scales 1:100, 1:75, and 1:50 and spending the overflow of Discharge to review piezometric pressure profiles, surface water, upstream depth of the weir and the coefficient Discharge overflow meridional curvature in plan and the lateral wall of convergence was discussed in relation Discharge between 0.3 Q / Qd 0.89 because of the convergence of the wall at the toe of the spillway wave roster-tail and the comparison discharge, 1
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