Scholarlink

<p>Wind energy is the most promising solution for future power generation. Many researchers focus their investigations on nonlinear blade geometry optimization. But designing and manufacturing nonlinear blades is quite challenging for a small-scale wind turbine in a low wind environment. This research selects an E-glass fiber and vinyl ester resin with a flat profiled wind turbine blade of 0.75-meter length to reduce the manufacturing cost and simplify the blade design. The blades are profiled as per the National Advisory Committee for Aeronautics (NACA) manual. The hand layup procedure was used to make the wind turbine rotor blades. The Blade element momentum theory (BEMT) determines the lift and drag coefficient. At varied wind speeds, the linear profile of NACA 4415 generates a coefficient of lift 6% higher than twisted NACA 4412 26% and 28% higher than symmetric NACA 0012 and 0015, respectively. In the wind tunnel, a scaled-down blade built with NACA 4415 is validated and matches both experimental and BEMT results with an error of 3.7% difference for lift and less than 1% for drag. The power coefficient computed using BEMT is a maximum of 0.42 for a tip speed ratio 4. It is closer to the value obtained from experimental analysis with an error of less than 2%. The structural integrity of the wind turbine was assessed using dynamic testing BEMT analysis, and the same was validated using Computational Fluid Dynamics (CFD).</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Effect of geometric profile linearisation of wind turbine blades in low wind regions

  • 期刊论文

  • 发表日期：

    2025年1月17日

查看全文
  • Bibin Chidambaranathan,
  • Gopinath Soundararajan,
  • Ashok Kumar Rajendran,
  • Arunkumar Sakthivel,
  • Yuvarajan Devarajan

摘要

Wind energy is the most promising solution for future power generation. Many researchers focus their investigations on nonlinear blade geometry optimization. But designing and manufacturing nonlinear blades is quite challenging for a small-scale wind turbine in a low wind environment. This research selects an E-glass fiber and vinyl ester resin with a flat profiled wind turbine blade of 0.75-meter length to reduce the manufacturing cost and simplify the blade design. The blades are profiled as per the National Advisory Committee for Aeronautics (NACA) manual. The hand layup procedure was used to make the wind turbine rotor blades. The Blade element momentum theory (BEMT) determines the lift and drag coefficient. At varied wind speeds, the linear profile of NACA 4415 generates a coefficient of lift 6% higher than twisted NACA 4412 26% and 28% higher than symmetric NACA 0012 and 0015, respectively. In the wind tunnel, a scaled-down blade built with NACA 4415 is validated and matches both experimental and BEMT results with an error of 3.7% difference for lift and less than 1% for drag. The power coefficient computed using BEMT is a maximum of 0.42 for a tip speed ratio 4. It is closer to the value obtained from experimental analysis with an error of less than 2%. The structural integrity of the wind turbine was assessed using dynamic testing BEMT analysis, and the same was validated using Computational Fluid Dynamics (CFD).