engleski

Reducing channel flow energy losses using deflectors

This paper gives an overview of the optimization process for deflector shape design. The task was to lower the water level in the S-shaped outflow channel of HPP Vinodol by steadying the flow and reducing energy losses. Parameterized designs of ten deflectors were optimized using a genetic algorithm that evaluated each setup by running a 2D fluid flow simulation. After analyzing total pressure losses in channel segments, optimal designs were chosen according to total pressure loss and flow uniformity throughout the channel. The resulting best case design set showed a 37% reduction in energy losses over the worst-case representation of the actual channel. This provides a solid basis for further simulations using a 3D fluid flow numerical model of the channel. The 3D simulation based on the best 2D case design set showed a significant decrease in spillage through the channel ceiling into the above engineering room.

optimization; parametric design; CFD; HPP outflow channel

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