垂直縦軸型貫流式風車の空力特性

新案内羽根の設置による性能向上と空力的考察

抄録

Vertical axial cross flow type of wind turbines are considered to have superior characters in comparison with the conventional propeller type of HAWT, i. e., operating as strong torque at starting and all direction of the wind without the yaw drive system which lead to the simple structure and low cost while the performance is inferior to that in power. In this paper, aerodynamic characteristics of the cross flow type of wind turbine were studied experimentally by using sub-scale model, especially considering the effect of guide vanes and its arrangement. The flow characteristics of the convergent type of triangular arrangement of flat plate of guide vanes with inclined angle θ=45 [deg] using in our approaching guide vanes exposed to stream flow are discussed the effect on flow fields, based on the numerical analysis for this simplified model. Subsequently, two upper and lower front guide vanes were cleared to be effective in performance. The aerodynamics characteristics of the turbine with the conventional/new advanced guide vanes for 30 rotors blades condition were discussed to specify the performance, correlated by tip speed ratio with the power and the torque coefficients, considering the effect of attaching the flap and of the setting angles to the flat plate guide vanes.