乱流モデル無利用による水平軸風車特性の数値解析

抄録

In the design for a wind turbine, the validation of the numerical computation result is almost carried out by the comparison with the wind tunnel experiment. However, the Reynolds number of the wind tunnel experiment is low and the flow does not become turbulence fully developed on a leading edge of wind turbine blade. Therefore, the transition area from laminar to turbulence becomes wide under the conditions, and the separation point is difficult to predict using the turbulence models. The prediction precision extremely decreases in the tip speed ratios less than a maximum power point. This study carries out the unsteady calculation without and with turbulence models for a 3-blades horizontal axis wind turbine. The validation of the calculations is performed by comparing with the experimental results. The power coefficients calculated without turbulence models are in agreement with the experimental data for the high tip speed ratio heiger than 5.