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On the rotation of a Savonius turbine at low Reynolds numbers subject to Kolmogorov cascade of turbulence
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Ōtomo, Shūji, Tasaka, Yuji, Denissenko, Petr and Murai, Yuichi (2024) On the rotation of a Savonius turbine at low Reynolds numbers subject to Kolmogorov cascade of turbulence. Physics of Fluids, 36 (2). 027104. doi:10.1063/5.0180939 ISSN 1089-7666.
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Official URL: https://doi.org/10.1063/5.0180939
Abstract
With an increasing demand for small energy generation in urban areas, small-scale Savonius wind turbines are growing their share rapidly. In such an environment, Savonius turbines are exposed to low mean velocity with highly turbulent flows made by complex geographies. Here, we report the flow-induced rotation of a Savonius turbine in a highly turbulent flow (18% turbulence intensity). The high turbulence is realized by using the far-field of an open-jet. Compared to low turbulence inflow (1% turbulence intensity), the turbine rotates 4% faster in high turbulence since the torque/power increases with turbulence intensity. The wake measurement by hot-wire anemometry and particle image velocimetry reveals the suppression of vortex shedding in high turbulence. In addition, a newly developed semi-empirical low-order model, which can include the effect of turbulence intensity and integral length scale, also confirms high turbulence intensity contributes to the rotation of the turbine. These results will boost more installation of small Savonius turbines in urban areas in the future.
Item Type: | Journal Article | ||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||
SWORD Depositor: | Library Publications Router | ||||||
Journal or Publication Title: | Physics of Fluids | ||||||
Publisher: | AIP Publishing | ||||||
ISSN: | 1089-7666 | ||||||
Official Date: | 2 February 2024 | ||||||
Dates: |
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Volume: | 36 | ||||||
Number: | 2 | ||||||
Article Number: | 027104 | ||||||
DOI: | 10.1063/5.0180939 | ||||||
Status: | Peer Reviewed | ||||||
Publication Status: | Published | ||||||
Re-use Statement: | This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Ōtomo, Shūji, Tasaka, Yuji, Denissenko, Petr and Murai, Yuichi (2024) On the rotation of a Savonius turbine at low Reynolds numbers subject to Kolmogorov cascade of turbulence. Physics of Fluids, 36 (2). 027104. and may be found at: https://doi.org/10.1063/5.0180939 | ||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||
Date of first compliant deposit: | 14 March 2024 |
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