CFD simulation and wind loads evaluation on wind turbine blades in mountainous terrain under thunderstorm downbursts.
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| Title: | CFD simulation and wind loads evaluation on wind turbine blades in mountainous terrain under thunderstorm downbursts. |
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| Authors: | Ji, Baifeng1,2 (AUTHOR) jbfeng@whut.edu.cn, Chen, Changkun2 (AUTHOR), Zhong, Kuanwei3 (AUTHOR) zhongkuanwei@163.com, Xu, Haiwei4 (AUTHOR), Yin, Xu5 (AUTHOR), Ye, Fan5 (AUTHOR) |
| Source: | International Journal of Green Energy. 2025, Vol. 22 Issue 14, p3234-3254. 21p. |
| Subject Terms: | *Wind turbine blades, *Mountain ecology, Computational fluid dynamics, Structural reliability, Wind pressure, Microbursts, Numerical analysis |
| Abstract: | Downbursts are serious threat to the structural safety of wind turbines during thunderstorm season. This work develops and validates a CFD based numerical model to analyze the wind load characteristics of wind turbine blades in mountainous terrain under thunderstorm downbursts. Additionally, the impacts of wind turbine installation position and operation state are investigated on the blade loading characteristics of wind turbines, and the distribution characteristics of wind turbine blade loading along the spanwise direction of the blade are numerically analyzed in detail. The results show that blade loads on the windward side of the mountain are reduced by the downburst, while the blade loads on the leeward side of the mountain may reach up to 2.9 times larger than that in the flat terrain. Besides, the rotating blade load is larger than the stationary one in the downburst, and the difference in horizontal thrust is up to 3.9 times in the flat terrain and 4.3 times in the mountainous terrain. The middle and tip regions of the blade are the main loaded and wind-sensitive regions under downburst. This work may provide theoretical guidance for evaluation and optimization of the wind turbine blades under downburst. [ABSTRACT FROM AUTHOR] |
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| Database: | GreenFILE |
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| Abstract: | Downbursts are serious threat to the structural safety of wind turbines during thunderstorm season. This work develops and validates a CFD based numerical model to analyze the wind load characteristics of wind turbine blades in mountainous terrain under thunderstorm downbursts. Additionally, the impacts of wind turbine installation position and operation state are investigated on the blade loading characteristics of wind turbines, and the distribution characteristics of wind turbine blade loading along the spanwise direction of the blade are numerically analyzed in detail. The results show that blade loads on the windward side of the mountain are reduced by the downburst, while the blade loads on the leeward side of the mountain may reach up to 2.9 times larger than that in the flat terrain. Besides, the rotating blade load is larger than the stationary one in the downburst, and the difference in horizontal thrust is up to 3.9 times in the flat terrain and 4.3 times in the mountainous terrain. The middle and tip regions of the blade are the main loaded and wind-sensitive regions under downburst. This work may provide theoretical guidance for evaluation and optimization of the wind turbine blades under downburst. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 15435075 |
| DOI: | 10.1080/15435075.2025.2496916 |
