不同脉动源对风力机攻角及气动力非定常特性的影响

李银然; 魏魁; 郭兴铎; 张苏彩; 柳银环

doi:doi:10.19912/j.0254-0096.tynxb.2024-1439

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不同脉动源对风力机攻角及气动力非定常特性的影响

更新时间：2026-01-08

- 不同脉动源对风力机攻角及气动力非定常特性的影响
- Vol. 46, Issue 12, Pages: 589-598(2025)
- 作者机构：
- 作者简介：
- 基金信息：
- DOI：doi:10.19912/j.0254-0096.tynxb.2024-1439
  CLC： TK89
- Published Online：07 January 2026，
  
  Published：2025
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李银然, 魏魁, 郭兴铎, et al. 不同脉动源对风力机攻角及气动力非定常特性的影响[J]. 2025, 46(12): 589-598.
DOI：

李银然, 魏魁, 郭兴铎, et al. 不同脉动源对风力机攻角及气动力非定常特性的影响[J]. 2025, 46(12): 589-598. DOI： doi:10.19912/j.0254-0096.tynxb.2024-1439.

摘要

构建湍流、偏航、剪切流、塔影4种非定常脉动源

采用大涡模拟（LES）研究非定常脉动源对风力机翼型攻角和气动力非定常特性的影响。研究表明

偏航和风剪切工况下

攻角和升力系数均呈现近似正余弦波动规律;塔影工况下

攻角和升力系数在方位角180°附近急剧下降;而湍流工况下

攻角在时间和空间维度上均呈现随机性。除风剪切外

其余工况下攻角和升力系数的波动程度大致由叶尖至叶根增大。非定常脉动源导致压力面与吸力面前缘的压力波动幅度显著增大

且越靠近叶尖

增幅越明显;此外

叶片吸力面上的压力波动大于压力面。湍流是导致叶片攻角、升力系数及压力波动最大的非定常脉动源

其来流速度谱在惯性子区内呈现-5/3的斜率

输出功率谱呈现-11/3的斜率

二者斜率之间存在非线性相互作用

另外在前缘附近湍流下的压力波动呈现较强的周期性

且对大尺度湍流响应更强烈。

Abstract

Four unsteady pulsation sources including turbulence

yaw

shear flow and tower shadow are constructed

and large eddy simulation was used to study the influence of the unsteady pulsation sources on the angle of attack and aerodynamic unsteady characteristics of the wind turbine airfoil. The study shows that under yaw and wind shear conditions

the angle of attack and lift coefficient both show an approximate sine and cosine fluctuation pattern. Under tower shadow conditions

the angle of attack and lift coefficient drop sharply near an azimuth angle of 180°. Under turbulence conditions

the angle of attack shows randomness in both time and space dimensions. Except for wind shear

the fluctuation amplitude of the angle of attack and lift coefficient under other working conditions increases roughly from the tip to the root of the blade. The unsteady pulsation source greatly increases the pressure fluctuations on the leading edge of the pressure side and the suction side

and the increase is more obvious as it approaches the blade tip; In addition

the pressure fluctuation on the suction side of the blade is greater than that on the pressure side. Turbulence is an unsteady pulsation source that induces most significant fluctuations in the blade angle of attack

lift coefficient

and pressure. The incoming velocity spectrum shows a slope of -5/3 in the inertial subrange

while the output power spectrum shows a slope of -11/3. There exists a nonlinear interaction between these two slopes. Furthermore

the pressure fluctuations caused by turbulence near the leading edge exhibit strong periodicity and respond more intensely to large-scale turbulence.

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