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<p>Wind energy is the suitable and sustainable sources of energy to fulfil the projected energy demands and to diminish the climate changes. Savonius vertical axis wind turbines (VAWT) are in fact the most appropriate energy producer for small-scale applications. However, the existing Savonius turbines are less efficient compared to other types of turbines. To achieve aerodynamically efficient blade design, optimal design parameters like aspect ratio, diameter, height, overlap ratio are identified. Ten different Savonius designs are modelled, and computational investigations are done using ANSYS Fluent and the outcomes are validated experimentally. The starting ability of the Savonius VAWT model is determined through static computational fluid dynamics analysis. The results revealed that conventional Bach Savonius produces 42.7% more static torque coefficient (<i>C</i><sub>T</sub>) than the conventional semi-circular Savonius. The innovative two- and four-bladed, NACA 9407 imposed untwisted Savonius designs developed in this study provides 62.9% and 67.9% more static <i>C</i><sub>T</sub> compared to the better-performing conventional Bach model. For material selection, the structural parameter investigations on two-bladed Bach and two-bladed NACA 9407 aerofoil imposed untwisted Savonius (hybrid model) turbine was executed based on two-way coupling fluid structural interaction (FSI) approach. From the structural analysis, it was found that the imposition of boron epoxy composite&#xa0;on the Bach and hybrid model provides lesser deformation, stress and strain when compared to the&#xa0;other materials. The hybrid model is found to be structurally efficient because it provides 96%, 35% and 37% lesser deformation, strain and stress compared to Bach model with boron epoxy composite.</p>

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Design, aerodynamic performance and structural integrity investigations of aerofoil profiled Savonius vertical axis wind turbine

  • 期刊论文

  • 发表日期：

    2025年2月19日

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  • Sheeba Chandran,
  • Varshini Subramanian Natarajan,
  • Arockia Roshan Anthony Doss,
  • Senthil Kumar Madasamy,
  • Beena Stanislaus Arputharaj,
  • Parvathy Rajendran,
  • Laxana Sourirajan,
  • Janani Priyadharshini Veeraperumal Senthil Nathan,
  • Arul Prakash Raji,
  • Vijayanandh Raja

摘要

Wind energy is the suitable and sustainable sources of energy to fulfil the projected energy demands and to diminish the climate changes. Savonius vertical axis wind turbines (VAWT) are in fact the most appropriate energy producer for small-scale applications. However, the existing Savonius turbines are less efficient compared to other types of turbines. To achieve aerodynamically efficient blade design, optimal design parameters like aspect ratio, diameter, height, overlap ratio are identified. Ten different Savonius designs are modelled, and computational investigations are done using ANSYS Fluent and the outcomes are validated experimentally. The starting ability of the Savonius VAWT model is determined through static computational fluid dynamics analysis. The results revealed that conventional Bach Savonius produces 42.7% more static torque coefficient (CT) than the conventional semi-circular Savonius. The innovative two- and four-bladed, NACA 9407 imposed untwisted Savonius designs developed in this study provides 62.9% and 67.9% more static CT compared to the better-performing conventional Bach model. For material selection, the structural parameter investigations on two-bladed Bach and two-bladed NACA 9407 aerofoil imposed untwisted Savonius (hybrid model) turbine was executed based on two-way coupling fluid structural interaction (FSI) approach. From the structural analysis, it was found that the imposition of boron epoxy composite on the Bach and hybrid model provides lesser deformation, stress and strain when compared to the other materials. The hybrid model is found to be structurally efficient because it provides 96%, 35% and 37% lesser deformation, strain and stress compared to Bach model with boron epoxy composite.