为探究无叶片风力发电机的风振特性，本文以某3m高、额定功率100 W的无叶片风力发电机为研究对象开展研究。首先建立风机的有限元模型，计算获得固有模态信息，并预测其风致振动。随后，对此风机的足尺模型进行风洞试验。最后，将试验结果与理论预测结果进行对比，综合分析其风致振动规律。结果表明：风机顶端横风向位移随着风速的增大表现出先增大后减小的趋势，呈现出典型的涡振现象，因此在高风速环境下无需考虑刹车系统等安全措施；同时，在风速稳定的情况下，风机顶端的位移时程接近标准正弦曲线，表现出稳定的风致振动；此外，风机各个方向的气动特征也大致相同，具有较好的全风向适应性，无需依赖额外的偏航系统即可应对风向改变。
Abstract
In order to explore the wind vibration characteristics of bladeless wind turbines, a bladeless wind turbine with a height of 3 m and a rated power of 100 W was taken as the research object. Firstly, the finite element model of the wind turbine is established, the natural mode information is calculated, and the wind-induced vibration is predicted. Subsequently, a full-scale model of the turbine was tested in a wind tunnel. Finally, the experimental results are compared with the theoretical prediction results, and the wind-induced vibration law is comprehensively analyzed. The results show that the cross-wind displacement at the top of the fan increases first and then decreases with the increase of wind speed, showing a typical vortex phenomenon, so there is no need to consider safety measures such as braking system in high wind speed environment. At the same time, when the wind speed is stable, the displacement time history of the top of the fan is close to the standard sinusoidal curve, showing stable wind-induced vibration. In addition, the aerodynamic characteristics of the wind turbine in all directions are also about the same, with good adaptability to all wind directions, and there is no need to rely on an additional yaw system to cope with wind direction changes.
关键词
无叶片风力发电机；涡激共振；风洞试验；有限元计算 /
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Key words
Bladeless wind turbines /
Vortex resonance /
Wind tunnel testing /
Finite element calculations
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