CFD(Computational Fluid Dynamics) analysis was carried out to analysis the air flow characteristics of vertical axis wind turbine system with accelerating device. Geometric arc angle of the accelerating device affects the air flow characteristics in the turbine with the effect of Coanda generated from the curved surface. Air velocity distributions with the device angle variation are compared. Flow velocity increases with the device length, and the accelerating device plays a key role in decreasing the air velocity in the wake flow region. Maximum air velocity variation becomes reduced with the accelerating device, and it is largely affected by the arc angle. These results are expected to be utilized in various ways to determine the shape of accelerating device for wind power generation system.

• 허진석(Division of Mechanical and Automotive Engineering of Wonkwang University) | Jin-Seok Heo
• 임성진(Division of Mechanical and Automotive Engineering of Wonkwang University) | Sung-Jin Lim
• 채용배(Division of Mechanical and Automotive Engineering of Wonkwang University) | Yong-Bae Chae
• 이상호(Member, Division of Mechanical and Automotive Engineering of Wonkwang University) | Sang-Ho Lee Corresponding Author