垂直軸揚力型風車のスケールモデルによる性能評価とRe数の影響

抄録

For Vertical Axis Lift-type Wind Turbine, in general, it is difficult to evaluate its performance through the scale-model wind tunnel tests, because of the scale effect relating to Reynolds number. However, it is beneficial to figure out the critical value of Reynolds number or minimum size of the wind turbine, when designing this type of micro wind turbine. Therefore, in this study, the performance tests of several scale-models of Vertical Axis Lift-type Wind turbine were investigated with wind tunnel test. The Range of Reynolds number was from 1.5X10⁴ to 2.3X10⁵ which include field-test machine Reynolds number. The results showed that the Reynolds number effect depends on the typical length of blade chord rather than the typical velocity of inlet velocity. In addition, in the range of our investigations, there was a transition point of the Reynolds number where the dominant driving force of wind turbine changed from Drag to Lift.