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The vertical-axis wind turbine (VAWT) has been the focus of several recent studies to improve its aerodynamic performance, with the basis on renewable energy sources. For improving the performance, the present work uses variable-pitch bladed VAWT with two distinct blade profiles. A 2-D numerical work has been conducted on a 3-bladed variable-pitch vertical-axis turbine by using NACA 0021 and NACA 23,021 blade profiles. The computational work uses unsteady Reynolds Average Navier–Stokes equation (URANS) and \(SST k-\omega\) turbulence model for simulating the flow around turbine. For all simulations, a sinusoidal pitching with an amplitude of 10° has been utilized in order to accommodate the variable-pitch mechanism. The moment and power coefficient values are computed for different tip speed ratios (TSR) and results are compared for both the profiles. Vorticity contours are displayed in the paper to see the impact on effectiveness.

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Variable-Pitch Vertical-Axis Turbine Evaluation Using NACA 4- and 5-digit Airfoils

  • 会议论文

  • 发表日期：

    2026年

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  • Dhanjita Medhi,
  • Atul Kumar Soti

摘要

The vertical-axis wind turbine (VAWT) has been the focus of several recent studies to improve its aerodynamic performance, with the basis on renewable energy sources. For improving the performance, the present work uses variable-pitch bladed VAWT with two distinct blade profiles. A 2-D numerical work has been conducted on a 3-bladed variable-pitch vertical-axis turbine by using NACA 0021 and NACA 23,021 blade profiles. The computational work uses unsteady Reynolds Average Navier–Stokes equation (URANS) and \(SST k-\omega\) turbulence model for simulating the flow around turbine. For all simulations, a sinusoidal pitching with an amplitude of 10° has been utilized in order to accommodate the variable-pitch mechanism. The moment and power coefficient values are computed for different tip speed ratios (TSR) and results are compared for both the profiles. Vorticity contours are displayed in the paper to see the impact on effectiveness.