縦渦により駆動される円柱翼風車の翼まわりの流れ場の数値解析

抄録

A novel wind turbine with circular cylinder blades, which is driven by the lift force produced by the longitudinal vortex. The wake ring plate with the eligible width is installed behind the cylinder in the wake region by retaining suitable gap distances between the cylinder and itself for employed the longitudinal vortex. In this study, the performance of this turbine is examined by using the numerical simulation. The predicting torque and the mechanical power from the CFD results are lower than the experimental data, however, the tendency of them correlate well with the maximum and minimum different as 23% and 2%, respectively. A longitudinal vortex occurs in the backside of rotation along the cylinder blade, which has a limited span wise length, and it induces the accelerating flow in the leading side. The rotating force is produced due to the different pressure gradient between rotation side and backside caused by the accelerating flow.