仿鸮翼型风力机叶片气动弹性变形分析
Analysis of aeroelastic deformation of bionic airfoil wind turbine blades
陈坤 1赵培尧 1冯文慧 1贵红亮 1郝振华1
作者信息
- 1. 新疆大学机械工程学院,新疆 乌鲁木齐 830017
- 折叠
摘要
为抑制风力机叶片的气动弹性变形,提出一种用于大型风力机的仿鸮类翼型改型设计方案.通过单向流固耦合方法分析了仿生翼型对叶片气动弹性变形的影响,并通过模态分析和共振响应阐述了仿生翼型抑制叶片气动弹性变形的机理.结果发现:与模型叶片相比,仿生翼型叶片气动弹性变形量降低了 11.05%.仿生翼型使叶片压力面应力分布趋势发生改变,使叶片压力面的最大应力值由叶中转移至前缘.仿生翼型使叶片上下表面的压力差提高,且吸力面的压力值约为原来的 2 倍,使叶片提高了在挥舞方向的抗变形能力.同时,叶片的气动性能有所提高.仿生翼型使叶片的一阶至六阶固有频率升高;仿生翼型使叶片在挥舞方向上的共振变形量减小了89.23%,叶片的共振速度和加速度幅值也降低了.故仿生翼型能够有效抑制叶片的气动弹性变形,其设计方法及结论可为抑制大型风力机叶片的气动弹性变形研究提供一种新思路.
Abstract
In order to suppress the aeroelastic deformation of wind turbine blades,a modified design of the bionic owl′s airfoil for large wind turbines was proposed.The effect of the bionic airfoil on the aeroe-lastic deformation of the blade was analyzed by the unidirectional fluid-structure coupling method,and the mechanism of the bionic airfoil suppressing the aeroelastic deformation of the blade was elaborated by modal analysis and resonance response.The results find that there is an 11.05%reduction in the aeroelastic deformation of the bionic airfoil blade compared to the model blade.The bionic airfoil makes the blade pressure surface stress distribution trend change,and makes the maximum stress value of the blade pressure surface transfer from the middle of the blade to the leading edge.The bionic airfoil makes the pressure difference between the upper and lower surface of the blade increase,and the pres-sure value of the suction surface is about twice the original,so that the blade in the flapping direction to improve the resistance to deformation.At the same time,the aerodynamic performance of the blades has been improved.The bionic airfoil pattern increases the first to sixth order intrinsic frequency of the blade,the bionic airfoil pattern causesan 89.23%reduction in the resonantdeformation of the blade in the flapping direction,and also reduces the resonant velocity and acceleration amplitude of the blade.Therefore,the bionic airfoil can effectively suppress the aeroelastic deformation of the blade,and its design method and conclusion can provide a new idea for the research of suppressing aeroelastic de-formation of large wind turbine blade.
关键词
风力机叶片/气动弹性变形/仿鸮翼型/单向流固耦合/固有频率Key words
wind turbine blade/aeroelastic deformation/bionic owl′s airfoil/unidirectional fluid-structure coupling/inherent frequency引用本文复制引用
基金项目
新疆维吾尔自治区自然科学基金(2022D01C33)
新疆维吾尔自治区研究生科研创新项目(XJ2022G049)
国家自然科学基金(51765062)
出版年
2024
国家科技期刊平台
NSTL
万方数据