| 代元军,胡垚,李保华,温彩凤.不同偏航角下双叉式叶尖结构对风力机气动噪声分布规律的影响*[J].,2024,43(4):912-921 |
| 不同偏航角下双叉式叶尖结构对风力机气动噪声分布规律的影响* |
| The influence of aerodynamic noise distribution law of wind turbine with double fork tip structure under different yaw angles |
| 投稿时间：2023-03-21 修订日期：2024-07-02 |
| 中文摘要: |
| 为研究不同偏航角下双叉式叶尖结构风力机气动噪声的分布规律。利用数值模拟方法计算了双叉式叶尖结构叶片风力机处于0~30°偏航角度下的气动噪声分布规律。结果表明：在不同偏航角下，叶尖涡和中心涡轨迹发生偏移，与风力机旋转面产生夹角且随着偏航角度增大而减小；300 Hz内的低频段是气动噪声能量主要集中区域，其值随着偏航角度增大呈现先增大后减小的变化规律；偏航角越大，沿叶片展向，最大声压级位置越靠近旋转轴，沿叶片轴向，声压级随轴向距离增大而减小。其计算结果与风洞试验所得流场速度与声压级变化规律一致，验证了其数值研究的可靠性，为小型风力机叶片低噪设计提供数据支持和试验验证。 |
| 英文摘要: |
| In order to study the distribution law of aerodynamic noise of wind turbine with double forked tip structure under different yaw angles. The distribution law of aerodynamic noise of wind turbine with double forked blade tip structure at 0~30°yaw angle is calculated by numerical simulation method. The results show that under different yaw angles, the trajectory of tip vortex and center vortex deviates, and the included angle with the rotating surface of the wind turbine increases with the increase of yaw angle; the low frequency band within 300 Hz is the main concentration area of aerodynamic noise energy, and its value first increases and then decreases with the increase of yaw angle; the larger the yaw angle is, the closer the position of the maximum sound pressure level is to the rotating axis along the blade spanwise, along the axial direction of the blade, the sound pressure level decreases with the increase of the axial distance. The calculated results are consistent with the variation law of flow field velocity and sound pressure level obtained from wind tunnel tests, which verifies the reliability of its numerical research, and provides data support and experimental verification for the low-noise design of small wind turbine blades. |
| DOI：10.11684/j.issn.1000-310X.2024.04.024 |
| 中文关键词: 风力机 偏航 噪声 数值模拟 |
| 英文关键词: Wind turbine yaw noise numerical calculation |
| 基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目） |
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