1801 垂直軸抗力型風車の内部流れの可視化による性能評価

概要

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Savonius type and Cross-flow type windmills are vertical-axis windmills using drag force. In addition to the characteristic of no necessity of the directional control to pointing the wind direction, these windmills start easily even in low wind velocity and have high torque owing to their large swept area. Optimum design configuration of Savonius type and Cross-flow type windmills are reported by wind tunnel experiments conducted by many researchers. In these experiments, however, the performance of windmills are obtained from output characteristics through the measurement of torque and rotational speed by changing the factor of design configuration. Therefore, until now, the behavior of air flow between the buckets of Savonius type windmill, and the behavior of an inflow air to inside of the rotor of Cross-flow type windmill are not clarified. Consequently, the relation between windmill performance and the behavior of the air flow have been indistinct. In this research, using P.I.V. system, the behavior of the air flow in the inside of the model rotors of Savonius type and Cross-flow type windmills are clarified through visualization. Thus, the performance of these windmills are evaluated through the behavior of the air flow.
2000-07-31