Abstract
This study looked at the effects of flow rates and guide vane angles on the performance of a cross flow turbine, which can be used to generate energy and hydraulic power with low head and low flow rates of water. A fluid dynamic analysis was performed on the cross-flow turbine with the aid of finite element techniques. The simulation was solved after validating the convergence of the provided model and its boundary conditions, with the outputs being the velocity profiles of the flow in the rotor and the pressure distribution on the rotor surface during its rotations. Experimental evaluation of the cross-flow turbine guide vane positions at a flow rate of 0.8, 0.6, and 0.5 m3/s was conducted, and it was discovered that a maximum turbine speed of 482 rpm and a generator speed of 1920 rpm were produced at the rotor shaft at a flow rate of 0.8 m3/s with a head of 25 m, and this data was validated by the results produced from the simulation. Doi: 10.28991/HIJ-2022-03-01-06 Full Text: PDF
Highlights
The impulse turbine is a development of the simple stream wheel, which uses the natural flow of water to power the rotor
In contrast to the stream wheel, which is powered by the natural flow of water, an impulse turbine created at a high height is powered by a strong jet of water [1, 2]
This study looked at the effects of flow rates and guide vane angles on the performance of a cross flow turbine, which can be used to generate energy and hydraulic power with low head and low flow rates of water, in contrast to large-scale power plants that use vast reservoirs of water to generate energy
Summary
The impulse turbine is a development of the simple stream wheel, which uses the natural flow of water to power the rotor. Suction is generated through the draft tube in the casing when the discharge medium exits the nozzle at a high velocity, creating a reactive force that drives the impeller in the opposite direction of the discharged fluid. The impacts of various geometric factors on the overall efficiency and power output of the turbine were investigated [6] Various factors, such as the number of blades attached to the rotor, the angle of attack of water on the rotor blades, and modifications in the inner to outer diametric ratios, were all part of the studies. Further research revealed that as the inner to outer diametric ratio was changed between 0.6 and 0.75, increasing the attack angle resulted in a loss in efficiency. This study looked at the effects of flow rates and guide vane angles on the performance of a cross flow turbine, which can be used to generate energy and hydraulic power with low head and low flow rates of water, in contrast to large-scale power plants that use vast reservoirs of water to generate energy
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