Experimental Investigation on Pressure Coefficients along Bottom Surface of Dam Tunnel Gate With aid of Mapping Presentations

M. Ahmed, Thamir (2016) Experimental Investigation on Pressure Coefficients along Bottom Surface of Dam Tunnel Gate With aid of Mapping Presentations. Second International Engineering Conference On Developments in Civil & Computer Engineering Applications 2016.

Text (Research Article) IEC2016.pdf - Published Version Download (21MB)

Abstract

Vertical lift gate is almost installed within the dam tunnel to control the water heads and quantity .The major function of such gate are to satisfy the requirements of power generation and demand of water downstream the dam. The bottom gate surface exposed to high pressure induced by water jet issuing below the gate and uplift force is produced and effect the operation and stability of the gate. In present research the physical hydraulic model was used to study the behavior of water flow pattern below the gate and the generation of pressure for two different lip gate geometries .The measurements upstream head ,downstream head ,jet velocity and peizometric heads distribution along and across the bottom gate surface were involved .The results were analyzed and expressed by using three dimensions presentation .The main conclusion states that the bottom pressure coefficient is influenced clearly by the lip gate shapes and gate openings .

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