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This research aims to enhance the performance and efficiency of vertical-axis wind turbines (VAWTs), which offer advantages over horizontal-axis wind turbines (HAWTs) but often struggle with a low power coefficient and poor self-starting capability. To overcome these limitations, the research explores the impact of various design parameters, such as blade count, power coefficient, angle of attack, tip speed ratio, and blade geometry. Specifically, two novel slotted blade profiles based on NACA0015 and S1046 airfoils are proposed for lift-type VAWTs. The slotted designs were developed using Autodesk Inventor, while their performance was analyzed through two-dimensional computational fluid dynamics (CFD) simulations in ANSYS Fluent, employing the SST k–omega turbulence model and the incompressible Reynolds-averaged Navier–Stokes (RANS) method. The slotted rotor blades were optimized for a wind speed of 8 m/s to maximize the lift-to-drag ratio. Results indicate that the NACA0015 slotted airfoil achieves a 45% increase in lift coefficient, while the S1046 slotted airfoil shows a 36% improvement. This investigation highlights the potential of innovative blade designs to significantly improve the aerodynamic performance of VAWTs, thereby contributing to their feasibility toward as a reliable renewable energy solution.

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Investigation of Aerodynamic Characteristics of Slotted Airfoils at Various Angles of Attack Using CFD Approach

  • 会议论文

  • 发表日期：

    2026年

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  • S. Biswas,
  • S. Roy,
  • A. Sharma,
  • D. Modak,
  • A. Hossain,
  • S. Singha,
  • S. Rakshit,
  • Gautam Choubey,
  • B. J. Bora,
  • A. R. Sengupta

摘要

This research aims to enhance the performance and efficiency of vertical-axis wind turbines (VAWTs), which offer advantages over horizontal-axis wind turbines (HAWTs) but often struggle with a low power coefficient and poor self-starting capability. To overcome these limitations, the research explores the impact of various design parameters, such as blade count, power coefficient, angle of attack, tip speed ratio, and blade geometry. Specifically, two novel slotted blade profiles based on NACA0015 and S1046 airfoils are proposed for lift-type VAWTs. The slotted designs were developed using Autodesk Inventor, while their performance was analyzed through two-dimensional computational fluid dynamics (CFD) simulations in ANSYS Fluent, employing the SST k–omega turbulence model and the incompressible Reynolds-averaged Navier–Stokes (RANS) method. The slotted rotor blades were optimized for a wind speed of 8 m/s to maximize the lift-to-drag ratio. Results indicate that the NACA0015 slotted airfoil achieves a 45% increase in lift coefficient, while the S1046 slotted airfoil shows a 36% improvement. This investigation highlights the potential of innovative blade designs to significantly improve the aerodynamic performance of VAWTs, thereby contributing to their feasibility toward as a reliable renewable energy solution.