| 风力机翼型在失速工况下非定常流场的本征正交分解分析 |
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| 引用本文： | 孙翀,石磊,沈昕,竺晓程,杜朝辉. 风力机翼型在失速工况下非定常流场的本征正交分解分析[J]. 工程热物理学报, 2021, 42(4): 894-904 |
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| 作者姓名： | 孙翀 石磊 沈昕 竺晓程 杜朝辉 |
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| 作者单位： | 上海交通大学机械与动力工程学院,上海200240 |
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| 基金项目： | 国家自然科学基金资助项目(No.11872249)。 |
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| 摘 要： | 风力机气动性能受静态失速与动态失速影响很大,对风力机翼型的失速问题研究具有重要意义.本文通过计算流体力学方法得到的风力机翼型在固定大攻角工况,以及大攻角震荡工况下的非定常流场,来研究翼型静态失速与动态失速.采用本征正交分解方法(POD),对非定常流场降阶,得到流场的POD模态以及对应的系数.POD模态结果表明在静态失速...
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| 关 键 词： | 风力机翼型 动态失速 本征正交分解(POD) |
Analysis of POD for the Flow Field of the Wind Turbine Airfoil at High Angle of Attack |
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| SUN Chong,SHI Lei,SHEN Xin,ZHU Xiao-Cheng,DU Zhao-Hui. Analysis of POD for the Flow Field of the Wind Turbine Airfoil at High Angle of Attack[J]. Journal of Engineering Thermophysics, 2021, 42(4): 894-904 |
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| Authors: | SUN Chong SHI Lei SHEN Xin ZHU Xiao-Cheng DU Zhao-Hui |
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| Affiliation: | (School of Mechanical Engineering,Shanghai Jino Tong University,Shanghai 20024,China) |
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| Abstract: | The aerodynamic performance of wind turbines is greatly affected by phenomenon of the stall and dynamic stall.Therefore,it is essential to study the stall problem of wind turbine airfoil.In this paper,the unsteady flow around both a static wind turbine airfoil and an oscillating airfoil under a big angle of attack is obtained by the method of the computational fluid dynamics to investigate the stall and the dynamic stall.The dominant modes and corresponding coefficients are extracted by the method of POD.The results show that the main unsteady characteristics of the static stall are the period shear vortices in the wake.For the dynamic stall,shear vortices generate from all the suction side not only the wake and leading edge. |
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| Keywords: | wind turbine airfoil dynamic stall POD |
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