Aerodynamic Performance Enhancement of an Axisymmetric Deflector Applied to Savonius Wind Turbine Using Novel Transient 3D CFD Simulation Techniques
Many recent studies show that the performance of Savonius turbines can be considerably increased by using wind deflectors. Axisymmetric deflectors are particularly interesting; they concentrate the wind flow in all directions. This study aims to aerodynamically optimize the truncated cone deflector...
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Published in | Energies (Basel) Vol. 16; no. 2; p. 909 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
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Basel
MDPI AG
01.01.2023
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Abstract | Many recent studies show that the performance of Savonius turbines can be considerably increased by using wind deflectors. Axisymmetric deflectors are particularly interesting; they concentrate the wind flow in all directions. This study aims to aerodynamically optimize the truncated cone deflector shape through transient 3D CFD simulations using sliding mesh techniques. To reduce the mesh size and thus the simulation time, symmetrical boundary conditions were applied to rotating body faces. A mesh grid sensitivity study was conducted to define the optimum mesh size. Additionally, hybrid numerical approaches combining coupled and SIMPLE solvers were particularly influential in reducing computational time. Concave- and convex-arced-shaped faces deflectors were compared to the original truncated cone deflector, showing an increase in the performance for the convex type and a decrease for the concave one. Then, eight cases involving convex spline shape deflectors were simulated. All these deflectors had an equal volume to the original truncated cone deflector. One of the cases showed a 20% average increase in the performance over the original deflector. This result shows the importance of the geometrical shapes in the design of axisymmetric deflectors. |
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AbstractList | Many recent studies show that the performance of Savonius turbines can be considerably increased by using wind deflectors. Axisymmetric deflectors are particularly interesting; they concentrate the wind flow in all directions. This study aims to aerodynamically optimize the truncated cone deflector shape through transient 3D CFD simulations using sliding mesh techniques. To reduce the mesh size and thus the simulation time, symmetrical boundary conditions were applied to rotating body faces. A mesh grid sensitivity study was conducted to define the optimum mesh size. Additionally, hybrid numerical approaches combining coupled and SIMPLE solvers were particularly influential in reducing computational time. Concave- and convex-arced-shaped faces deflectors were compared to the original truncated cone deflector, showing an increase in the performance for the convex type and a decrease for the concave one. Then, eight cases involving convex spline shape deflectors were simulated. All these deflectors had an equal volume to the original truncated cone deflector. One of the cases showed a 20% average increase in the performance over the original deflector. This result shows the importance of the geometrical shapes in the design of axisymmetric deflectors. |
Author | Polidori, Guillaume Aboujaoude, Hady Bogard, Fabien Murer, Sébastien Beaumont, Fabien |
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Cites_doi | 10.1007/s12206-012-0313-y 10.1080/10407790.2013.831682 10.1016/0167-6105(78)90037-5 10.1063/5.0034362 10.1115/GT2014-25967 10.1016/j.energy.2019.05.053 10.1016/j.apenergy.2011.03.025 10.1016/j.renene.2017.06.020 10.1115/1.2716419 10.1016/j.jweia.2021.104882 10.1016/j.jweia.2014.12.002 10.1016/j.jweia.2015.01.003 10.1016/j.energy.2014.11.023 10.1016/j.energy.2019.116214 10.1016/j.renene.2010.04.007 10.1115/GT2010-22762 |
ContentType | Journal Article |
Copyright | 2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. |
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SubjectTerms | Alternative energy sources Boundary conditions computational fluid dynamics (CFD) Computer applications Computing time Deflectors Design Energy resources Numerical analysis numerical solvers Rotating bodies Simulation Software transient three-dimensional simulations Turbines Turbulence models URANS Velocity vertical axis wind turbine wind deflector Wind power |
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Title | Aerodynamic Performance Enhancement of an Axisymmetric Deflector Applied to Savonius Wind Turbine Using Novel Transient 3D CFD Simulation Techniques |
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