水平軸小型風車のブレード形状に関する実験的研究 : 低設計周速比ロータの最適形状の検証(流体工学,流体機械)

概要

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In this study, two types of experimental models are prepared to compare the performance at low tip speed ratio. One has a rotor with tapered blades designed by the combined blade element and momentum theory, and the other has a rotor with inversely tapered blades in which the calculated chord lengths are applied in an opposite way. In this paper, the authors report a result of a performance test in a wind tunnel on experimental models. From these results, for both tapered and inversely tapered types, the maximum power coefficient is obtained for the largest chord length. As for the number of the blades, five blades has maximum power coefficient. We found that the performance of a rotor designed at low tip speed ratio (about λ=2) can be improved by increasing the number of blades and by adopting the inversely tapered blades.
社団法人日本機械学会の論文
2009-05-25