| 偏航工况下叶片翼型动态特性研究 |
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| 引用本文： | 李银然,赵丽,李德顺,马继武.偏航工况下叶片翼型动态特性研究[J].太阳能学报,2022,43(7):326-333. |
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| 作者姓名： | 李银然 赵丽 李德顺 马继武 |
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| 作者单位： | 1.兰州理工大学能源与动力工程学院,兰州 730050; 2.甘肃省流体机械及系统重点实验室,兰州 730050; 3.甘肃省风力机工程技术研究中心,兰州 730050 |
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| 基金项目： | 国家自然科学基金（51566011）；;国家重点基础研究发展（973）计划（2014CB046201）； |
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| 摘 要： | 首先通过理论分析,研究风力机偏航运行时叶片各翼型的攻角变化规律,建立翼型俯仰运动模型;然后基于大涡模拟（LES）方法,研究偏航工况下叶片翼型的动态气动特性。结果表明：风轮在偏航工况下运行时,叶片各截面翼型攻角变化呈近似的正余弦规律;叶片不同展向位置翼型均发生不同程度的流动分离,出现动态失速现象,越靠近叶根,由偏航引起的动态迟滞效应越明显;翼型俯仰过程中,吸力面前缘分离泡的动态变化过程,导致吸力面前缘压力出现小范围的剧烈振荡,增大流动的不稳定性。
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| 关 键 词： | 风力机 叶片 偏航 翼型 数值模拟 迟滞效应 |
| 收稿时间： | 2020-11-13 |
STUDY ON DYNAMIC CHARACTERISTICS OF BLADE AIRFOIL UNDER YAW CONDITION |
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| Li Yinran,Zhao Li,Li Deshun,Ma Jiwu.STUDY ON DYNAMIC CHARACTERISTICS OF BLADE AIRFOIL UNDER YAW CONDITION[J].Acta Energiae Solaris Sinica,2022,43(7):326-333. |
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| Authors: | Li Yinran Zhao Li Li Deshun Ma Jiwu |
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| Affiliation: | 1. College of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou 730050, China; 2. Key Laboratory of Fluid Machinery and System of Gansu Province, Lanzhou 730050, China; 3. Wind Energy Technology Research Center of Gansu Province, Lanzhou 730050, China |
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| Abstract: | Though theoretical analysis, the variation rules of attack Angle of each blade airfoil during yaw operation were studied, and the airfoil pitch movement model was established. Then, the dynamic aerodynamic characteristics of the blade airfoil under yaw conditions were studied based on the LES method. The results showed that the attack angle of each blade section was changeable with approximate sine or cosine regularity when the wind turbines are running under yaw conditions. Different degrees of flow separation occurred with different spanwise positions of the blades, appeared dynamic stall phenomenon, and closer to the blade root, the dynamic hysteresis effect was becoming more obvious. The dynamic change of the separation bubbles of suction-side front edge leads to the pressure of which have vicious oscillation in small areas, which increases the instability of the flow. |
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| Keywords: | wind turbines blades yaw airfoil numerical simulation hysteresis effect |
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