桅杆长径比对有限长锥台形捕能柱涡激横向摆动特性的影响

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振动与冲击 ›› 2023, Vol. 42 ›› Issue (9) : 261-267.

论文

龚曙光，徐凡业，谢桂兰，卢海山

作者信息 +

Effects of length-diameter ratio of mast on vortex-induced lateral swing characteristics of finite length cone-shaped energy capture column

GONG Shuguang, XU Fanye, XIE Guilan, LU Haishan

Author information +

文章历史 +

摘要

无叶片风力机是利用捕能柱的风致横向摆动收集风能并将其转换成电能的装置。本文通过引入桅杆结构并将其与有限长锥台型捕能柱构成一个捕能系统，在建立有限长锥台型捕能系统简化模型的基础上，推导了与捕能系统几何形状相关的无量纲结构系数计算式，探讨了桅杆长径比对有限长锥台型捕能柱涡激摆动特性及捕能效率的影响。所得结果表明，桅杆结构的引入能有效地提升有限长捕能柱的涡激横向摆幅峰值及捕能效率，且其均随桅杆长径比的增大呈现先增大后减小的趋势。与无限长捕能柱结构相比，在桅杆长径比为6.67时有限长捕能柱的能量收集效率提升了44.8%；增大桅杆的长径比会使锁频区间增宽，但捕能系统的固有频率会减小；对于给定的捕能系统存在一个与其相匹配的最佳桅杆长径比。所得结论对于无叶片风力机的设计与实际工程应用具有重要的指导作用。

Abstract

The bladeless wind turbine is a kind of device that collects wind energy by the wind-induced lateral swing of the energy capture column and converts it into electric energy. An energy capture system was constructed by introducing the mast structure and combining it with the finite length conical platform energy capture column in this paper. Based on the establishment of a simplified model of the finite length cone-platform energy capture system, the calculation formula of the dimensionless structure coefficient related to the geometry of the energy capture column was derived. The effect of length to diameter ratio of mast on vortex-induced swing characteristics and energy capture efficiency of the finite length cone-platform energy capture column was discussed. The results show that the introduction of the mast structure can be effectively improved the peak amplitude of vortex-induced swing and energy harvesting efficiency of the finite length energy capture column, and both of them increase first and then decrease with the increase of the length to diameter ratio of the mast. Compared with the structure with infinite length capture column, the energy collection efficiency of the finite length capture column is increased by 44.8% when the length to diameter ratio of the mast is 6.67. Increasing the length to diameter ratio of the mast will widen the frequency locking interval, but the natural frequency of the capture system will decrease. For a given capture system, there exists an optimal length to diameter ratio of the mast. The results are of great significance to the design and practical engineering application of the bladeless wind turbine.

导出引用

龚曙光，徐凡业，谢桂兰，卢海山. 桅杆长径比对有限长锥台形捕能柱涡激横向摆动特性的影响[J]. 振动与冲击, 2023, 42(9): 261-267

GONG Shuguang, XU Fanye, XIE Guilan, LU Haishan. Effects of length-diameter ratio of mast on vortex-induced lateral swing characteristics of finite length cone-shaped energy capture column[J]. Journal of Vibration and Shock, 2023, 42(9): 261-267

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