• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2023, Vol. 59 ›› Issue (4): 265-273.doi: 10.3901/JME.2023.04.265

• 可再生能源与工程热物理 • 上一篇    下一篇

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配重对拓宽无叶片风力机捕能区间的影响研究

龚曙光, 王翔, 谢桂兰, 卢海山, 徐凡业   

  1. 湘潭大学机械工程学院 湘潭 411105
  • 收稿日期:2022-08-05 修回日期:2022-12-05 出版日期:2023-02-20 发布日期:2023-04-24
  • 作者简介:龚曙光,男,1964年出生,博士,教授,博士研究生导师。主要研究方向为CAE技术的理论与应用、风电技术装备。E-mail:gongsg@xtu.edu.cn
  • 基金资助:
    国家自然科学基金资助项目(51875493)。

Study on the Influence of Counterweight on Widening the Energy Harvesting Range of Bladeless Wind Turbine

GONG Shuguang, WANG Xiang, XIE Guilan, LU Haishan, XU Fanye   

  1. School of Mechanical Engineering, Xiangtan University, Xiangtan 411105
  • Received:2022-08-05 Revised:2022-12-05 Online:2023-02-20 Published:2023-04-24

摘要: 为提高无叶片风力机的捕能效率,基于调谐捕能柱固有频率原理,提出采用配重方式拓宽无叶片风力机捕能区间的方法,推导添加配重后捕能柱固有频率的计算式,建立捕能柱涡激振动分析的仿真模型并进行了验证,探讨配重质量占比、配重块移动距离对捕能柱风速锁定区间与捕能效率的影响。所得结果表明,施加配重块后理论计算固有频率接近且大于捕能柱获得最大摆幅所对应的频率;配重块移动与其固定不动相比,捕能柱的捕能功率和风速锁定区间可显著提高,风速锁定区间长度增大了16.3倍;随着配重质量占比值的增大,捕能柱获得最大摆幅的风速锁定区间也增大,且区间长度与配重质量占比之间满足二次函数关系。这意味着当来流风速发生变化时,可通过调整配重块的位置,实现风能捕获最大化。

关键词: 无叶片风力机, 配重法, 风速锁定区间, 固有频率, 捕能效率

Abstract: To improve the energy harvesting efficiency of bladeless wind turbine, the method to widen the energy harvesting range of bladeless wind turbine by mean of counterweight is proposed based on the principle of tuning the natural frequency of the energy-capturing column(ECC). The formula for calculating the natural frequency of the ECC with counterweight is derived. The simulation model for vortex-induced vibration analysis is established and verified, and the effects of weight ratio and moving distance of counterweight on wind speed locking internal and energy harvesting efficiency of the ECC are discussed. The results show that the calculated natural frequency after the application of the counterweight is close to and larger than the frequency corresponding to the maximum swing amplitude of the ECC. The energy capture power and wind speed locking interval of the energy capture column can be significantly improved when the counterweight block is moved compared with that when it is fixed, and the length of the wind speed lock interval increased by 16.3 times. With the increase of the proportion of counterweight, the wind speed locking interval of the maximum swing of the ECC increases, and the relation between the interval length and the proportion of the counterweight mass satisfies the quadratic function. This means that wind energy capture can be maximized by adjusting the position of the counterweight when the incoming wind speed changes.

Key words: bladeless wind turbine, counterweight method, wind speed locking interval, natural frequency, energy harvesting efficiency

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