Abstract
To improve the efficiency of a gravitational water vortex turbine, the production of a strong vortex, capable of driving a runner for the generation of electricity is very important. Various design configurations have been investigated using the computational fluid dynamics approach. A cylindrical tank with a discharge hole at the bottom center is the most suitable configuration to generate a water vortex. The results show variations in vortices formed under different basin parameters such as inlet velocity, basin height, outlet diameter, inlet channel width, inlet channel depth and mass flow rate. It is concluded that the optimized design parameters improve the efficiency of the plant to a significant extent by the generation of a strong vortex with air core.
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