The Design Of 1kW Wind Turbine And The Experimental Study On Power Output

Through the analysis and study of propeller-type wind turbine.A 1kW Wind Turbine was designed by method of Glauert which is based on Betz theory, blade element momentum theory. The airfoil of blade used NACA632-415. The relative thickness of airfoil decreased from 15% to 10%,and the airfoil whose chord length decreasing from 256.2 mm away 480mm rotor centre to the tip of 125.2 mm. A blade twist angle of A is from the root 13.5°to the tip 0°reduced, and the twist angle B is from 23°to 0°reduced. Three Wind Turbine units was obtained through to install the two types blades respectively to the installation angle of 13.5°is recorded as wheelⅠ,and the angle of 23°is recorded as wheelⅡ.To compare the power output of Three Wind Turbine units through the method of lorry carrying. When using resistances, the unitⅠ-A units started to stall, in the wind speed of 14.6m/s and the output power is 710.4W.But the UnitⅡ-A andⅡ-B have no this phenomena, and to achieve the rated power in the wind speed of 10m / s and 12.9m /s. The start-up wind speed of UnitⅠ-A, unitⅡ-A and UnitⅡ-B are respectively 3.4m / s, 3.0m / s and 4.4m / s.So the unitⅠ-A is the best. The experimental results show that: reducing the installation angle of the blade can get a better stall and speed limit characteristics, but the output power is decreased. If increasing the installation of blade angle, the output power is increased, but the stall characteristics were not obvious at the time of high wind speed. So Optimization design of installation angle of output power can achieve a better output power and a better stall and speed limit characteristics.