Characteristics of Maple Seed Type Small Size Wind Turbine with About 70 cm Turbine Diameter Assumed Utilization in a Duct

This paper presents the experimental investigation of characteristics of a maple seed type small size wind turbine with about 70 cm turbine diameter. It can be settled widely in any home and company. However, the popularly used wind turbine is ordinary propeller type, and it needs more complicated technique especially at the field of producing the blade. From this cause, we have proposed a new type of wind turbine having the possibility of easy producing the wind turbine blade, maple seed type blade, concerning the rotation of falling maple seed in the nature world. As long as the use of the wind turbine, it can be effective to be utilized such a small size wind turbine that would be settled in a duct at home or company with the circumstances of swirling wind. We dealt with the blade having 70 cm diameter at the wind area of the wind turbine, which is larger than our previously investigated one. We obtained the results that its power coefficient to tip speed ratio changes by the installation conditions: the kind of blade shape, the number of blades, the radial position of the blade installation and the existences of wind cover and wire jointed between the blades. This paper presents the experimental investigation of characteristics of a maple seed type small size wind turbine with about 70 cm turbine diameter. It can be settled widely in any home and company. However, the popularly used wind turbine is ordinary propeller type, and it needs more complicated technique especially at the field of producing the blade. From this cause, we have proposed a new type of wind turbine having the possibility of easy producing the wind turbine blade, maple seed type blade, concerning the rotation of falling maple seed in the nature world. As long as the use of the wind turbine, it can be effective to be utilized such a small size wind turbine that would be settled in a duct at home or company with the circumstances of swirling wind. We dealt with the blade having 70 cm diameter at the wind area of the wind turbine, which is larger than our previously investigated one. We obtained the results that its power coefficient to tip speed ratio changes by the installation conditions: the kind of blade shape, the number of blades, the radial position of the blade installation and the existences of wind cover and wire jointed between the blades.