Open AccessVortex profile analysis under different diffuser size for inlet channel of gravitational water vortex power plant
Author(s) -
F M Tamiri,
E C T Yeo,
Mohd Azlan Ismail
Publication year - 2022
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1217/1/012014
Subject(s) - vortex , diffuser (optics) , mechanics , inlet , water flow , body orifice , kármán vortex street , marine engineering , physics , materials science , environmental science , optics , turbulence , engineering , mechanical engineering , environmental engineering , reynolds number , light source
Hydropower is a renewable technology to store the amount of electricity which is the least expensive. Gravitational Water Vortex Power Plant is an ultra-low head micro hydropower system working ranging from 0.7 m to 2m without having the needs of a large reservoir and installation area. Several researches have been conducted on its basin configuration, orifice diameter, blade configuration, the geometry of the basin shape but not onto the addition of the diffuser at the inlet channel. The function of the diffuser is to direct the water into the basin allowing the water vortex to travel towards the tangential direction where this phenomenon will increase the rate of speed flow through the turbine. The simulation results showed that the addition of the diffuser has significantly increased the tangential velocity and the kinetic energy of the vortices. The increase in the velocity of the flow increased the height of the vortex which also led to the increase in the strength of the vortex and affects the vortex uniformity.