Numerical study on wind and rain loads of large-scale wind turbine
Dong Hui1, Gao Qian-feng1, Deng Zong-wei2,3, Zhu Zhi-xiang2,3, Peng Wen-chun4
1. College of Civil Engineering and Mechanics, Xiangtan University, Xiangtan 411105, China
2. School of Civil Engineering, Hunan City University, Yiyang 413000, China
3. School of Civil Engineering, Central South University, Changsha 410075, China
4. Mid-South Design and Research Institute, China Hydropower Engineering Consulting Group Co., Changsha 410014, China
Based on FLUENT software, the wind field and wind-driven rain around a 2MW horizontal axis wind turbine are analyzed under the condition of rated operation and 50mm/h storm. It is shown that a large number of raindrops flow separated from both sides of the wind turbine with the wind, only parts of raindrops impact the windward of wind turbine, some raindrops on the wake area flow back and hit the leeward of wind turbine. 99% of the raindrops impacting the wind turbine are below 2.5mm in diameter. Flow field suddenly changes when airflow flow past the wind turbine, the adjustment of raindrops speed lag from the change of wind speed, causes the final horizontal speed of raindrops no longer equal to the horizontal wind speed. The rain load on wind rotor and nacelle can be ignored when the wind turbine operated in rainstorm weather, but the rain load on the tower should be counted for its value is more than 12% of tower wind load.
收稿日期: 2014-01-08
出版日期: 2015-08-15
引用本文:
董 辉1 高乾丰1 邓宗伟2,3 朱志祥2,3 彭文春4. 大型风力机风雨荷载特性数值研究[J]. 振动与冲击, 2015, 34(15): 17-22.
Dong Hui1, Gao Qian-feng1, Deng Zong-wei2,3, Zhu Zhi-xiang2,3, Peng Wen-chun4 . Numerical study on wind and rain loads of large-scale wind turbine. JOURNAL OF VIBRATION AND SHOCK, 2015, 34(15): 17-22.
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