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CFD Analysis of Savonius VAWT for Household Application

Ramesh K. Kavade, Pravin M. Ghanegaonkar, Sharad Garg


Fossil fuels are depleting at very fast rate and will have shortages in near future. Also, prices of fuels
increase day-by-day, demands of renewable energy sources increases for electrical power generation.
Wind energy is available in nature free of cost and in abundant form, so is an excellent option for
generation of electric power through wind turbine technology. Rapid increase in global energy
requirement resulted in considerable attention towards renewable energy sources as there are
shortages of fossil fuels. Wind energy is one of the clean and potential renewable energy resources. It
is free of cost and available everywhere abundantly on the earth. VAWT is one of the important
options to produce sufficient electricity for household’s application in rural and urban areas as it
works independently irrespective of the direction of wind. Savonius turbine is a vertical axis wind
turbine which is drag type and characterized as cheaper, simple in construction and can operate at
low speed. This makes it suitable for generating electrical power for household application at rural
and urban areas. This research work contains computational fluid dynamics (CFD) analysis of
different models of Savonius wind turbines at constant wind speed of 10.5 m/s to determine the power
output of the turbine and the effects of various design parameters like blade profile, number of blades,
aspect ratio and swept area on the performance of power coefficient (Cp) of the turbine. It was found
from CFD analysis that, the power output mainly depends on swept area of the blade and hence full
profile blade turbine has more power coefficient than the cut blade profile turbine.


Vertical axis wind turbine, computational fluid dynamics, aspect ratio, power output, power coefficient

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