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首页> 外文期刊>Energy Conversion & Management >The impact of inertial forces on morphing wind turbine blade in vertical axis configuration
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The impact of inertial forces on morphing wind turbine blade in vertical axis configuration

机译：惯性力对垂直轴配置中变形的风力涡轮机叶片的影响

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摘要

A novel flexible blade concept with the ability to morph and geometrically adapt to changing flow conditions has been proposed to improve part-load performance of horizontal-axis wind turbines. The extension of these benefits to a vertical axis wind turbine would make wind technology a more competitive player in the energy market. Both flexible and rigid wind turbine rotor blades for vertical axis application were modeled, designed, manufactured and tested. Their performances were tested in a low speed wind tunnel. The predicted magnitude and direction of blade morph was validated using a high speed camera as well as finite element analysis. The comparative results of straight rigid and straight morphing blades show that the coefficient of performance greatly depends on the tip speed ratio. Overall, the morphing blade has better performance at low RPMs, but the rigid blade performed better at high RPMs. It was observed that the flexible blade self-started in the majority of the experiments. At high RPM, the centrifugal force overwhelmed the lift force, bending the flexible blade out of phase in an undesired direction increasing drag and therefore reducing the coefficient of performance.
机译：为了提高水平轴风力涡轮机的部分负荷性能，已经提出了一种新颖的柔性叶片概念，其具有变形能力和几何形状以适应变化的流动条件。将这些好处扩展到垂直轴风力涡轮机将使风能技术在能源市场上更具竞争力。对垂直轴应用的柔性和刚性风力涡轮机转子叶片都进行了建模，设计，制造和测试。他们的性能在低速风洞中进行了测试。使用高速相机以及有限元分析验证了叶片变形的预测大小和方向。笔直的刚性刀片和笔直的变形刀片的比较结果表明，性能系数很大程度上取决于叶尖速比。总体而言，变形刀片在低RPM时具有更好的性能，但刚性刀片在高RPM时表现更好。观察到，在大多数实验中，柔性刀片都是自启动的。在高RPM时，离心力压倒了升力，使柔性叶片沿不希望的方向异相弯曲，从而增加了阻力，从而降低了性能系数。

著录项

  • 来源
    《Energy Conversion & Management》 |2015年第2期|54-62|共9页
  • 作者

    Jonathan Butbul; David MacPhee; Asfaw Beyene;

  • 作者单位

    Department of Mechanical Engineering, San Diego State University, San Diego, CA 92182, United States;

    Department of Mechanical Engineering, San Diego State University, San Diego, CA 92182, United States;

    Department of Mechanical Engineering, San Diego State University, San Diego, CA 92182, United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Wind energy; Turbine; Morphing blade; Vertical axis;

    机译：风能;涡轮;变形刀片;垂直轴;

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