Abstract
Small and micro wind turbines (micro-wind turbines) with generation power up to 10 kW are used mostly for low power supply distributed facilities. Low and ultra-low power vertical axis wind turbines (VAWT) for DC supply local grids intended for street lighting installations were created and tested at South Ural State University (Chelyabinsk). Series of experimental and theoretical research for optimizing the wind turbine rotor design were made. The main objective was to study the aerodynamic characteristics. The obtained results contain the basic overall elements optimal ratios of a rotor which provides the increase of desired design power. The results include as well the calculated aerodynamic characteristics of the blades, the result of the choice of the optimal profile, calculated relative sizes of the angles of the blades and their installation procedure, and much more. We also calculated the dependence of power efficiency on tip speed ratio with the main aerodynamic curve of the rotor. We obtained data for all the usable range of tip speed ratio for aerodynamic forces and torques required for the strength and dynamic calculation. We have built an array of wind power values as a function of two variables: wind speed and angular rotor speed for the application in the control system.
Keywords
Wind turbine, micro wind, aerodynamic characteristics, rotor, wind power.
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