Abstract
A fixed vane is introduced to a vertical axis wind turbine to accelerate the rotor and improve the turbine performance. The vane is located along the rotor circumference with the arm angle α, and α = 40° ~ 60° is the most effective in raising the power coefficient of the turbine. On the other hand, reverse rotation of the turbine was caused at α = -10° ~ -30°. Furthermore, the turbine rotation was totally suppressed at α = 0° and -40°.
