The Proceedings of the National Symposium on Power and Energy Systems
Online ISSN : 2424-2950
2021.25
Session ID : C114
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Effect of number of S-shaped blades on power of orthopter-type wind turbine
*Takuma SHIMATakahiro KIWATATakaaki KONO
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Abstract

This paper describes the performance of orthopter-type wind turbine with S-shaped blades using two-dimensional numerical simulation. Orthopter-type wind turbine is one of the variable-pitch vertical-axis wind turbine of which each blade rotates on their own axis meanwhile all of blades rotate on its main axis. This configuration ensures that the blades rotate around their own axis by 360° during each two-full revolution of the main rotor. In this paper, the effect of the number of S-shaped blades is researched. The number of blades N is varied to N = 2, 3, 4. The diameter of the wind turbine is 510 mm. The chord length c is 400 mm (N = 2, 3) and 290 mm (N = 4). The averaged power coefficient CP with two S-shaped blades is larger than those with three and four S-shaped blades. The number of blades has effects on pressure distributions around the wind turbine. Thus, orthopter-type wind turbine with two S-shaped blades is suitable shape for the orthopter-type wind turbine.

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© 2021 The Japan Society of Mechanical Engineers
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