水平轴风力机尾迹叶尖涡运动轨迹的实验研究
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摘要
利用高频PIV系统采集水平轴风力机下游远至4.5倍风轮直径范围内的尾流数据。首先通过对涡量场云图分析发现叶尖涡"交互跳跃"现象;然后对比不同翼型、风速、尖速比下,1、2、3、4倍风轮直径处的平均涡量值发现:随着尖速比的增加,叶尖涡"交互跳跃"现象提前发生;随着风速的增加,叶尖涡"交互跳跃"现象推后发生;得出叶尖涡"交互跳跃"现象的出现是尾流速度开始恢复的标志。而NACA4415翼型叶片发生叶尖涡"交互跳跃"现象的时间比S翼型叶片推迟,所以NACA4415翼型叶片的尾流速度恢复比S翼型叶片推迟。
The wake data of 4.5 times of the wind wheel of the horizontal axis wind turbine were collected by utilizing the TR-PIV. The"leapfrogging phenomenon"of the tip vortex was discovered;Then by comparing the average vorticity value in 1,2,3,4 times the diameter of the wind wheel position under various airfoil,wind velocity and tip speed ratio,the founding is that with the increase of the tip speed ratio,The"leapfrogging phenomenon"of the tip vortex will take place in advance;With the increase of the wind velocity,The"leapfrogging phenomenon"of the tip vortex pushes back,and get the conclusion that the"leapfrogging phenomenon"of the tip vortex is the sign of the recovery of the wake velocity.The position that the"leapfrogging phenomenon"of the tip vortex of the airfoil of NACA4415 happens later than the airfoil of S,so the recovery of the wake velocity of the airfoil of NACA4415 is also later than the airfoil of S.
The wake data of 4.5 times of the wind wheel of the horizontal axis wind turbine were collected by utilizing the TR-PIV. The"leapfrogging phenomenon"of the tip vortex was discovered;Then by comparing the average vorticity value in 1,2,3,4 times the diameter of the wind wheel position under various airfoil,wind velocity and tip speed ratio,the founding is that with the increase of the tip speed ratio,The"leapfrogging phenomenon"of the tip vortex will take place in advance;With the increase of the wind velocity,The"leapfrogging phenomenon"of the tip vortex pushes back,and get the conclusion that the"leapfrogging phenomenon"of the tip vortex is the sign of the recovery of the wake velocity.The position that the"leapfrogging phenomenon"of the tip vortex of the airfoil of NACA4415 happens later than the airfoil of S,so the recovery of the wake velocity of the airfoil of NACA4415 is also later than the airfoil of S.
引文
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[3]吕靖峰.我国风能产业发展及政策研究[D].北京:中央民族大学,2013.[3]Lyu Jingfeng.Development and policy research on wind energy industry[D].Beijing:Central University for Nationalities,2013.
[4]李俊峰,蔡丰波,乔黎明,等.2014中国风电发展报告[R].北京:中国环境科学出版社,2014.[4]Li Junfeng,Cai Fengbo,Qiao Liming,et al.2014China wind power review and report[R].Beijing:China Environmental Science Press,2014.
[5]Herbert G M J,Iniyan S,Sreevalsan E,et al.A review of wind energy technologies[J].Renewable&Sustainable Energy Reviews,2007,11(6):1117-1145.
[6]胡丹梅,欧阳华,杜朝辉.水平轴风力机尾迹流场试验[J].太阳能学报,2006,27(6):606-612.[6]Hu Danmei,Ouyang Hua,Du Chaohua.PIVexperimental study on the wake flow of horizontal axis wind turbine model[J].Acta Eergiae Solaris Sinica,2006,27(6):606-612.
[7]Haans W,Sant T,Van K,et al.Measurement of tip vortex paths in the wake of a HAWT under yawed flow conditions[J].Journal of Solar Energy Engineering,2005,127(4):456-463.
[8]杨瑞,王小丽,王强,等.不同布置方案风力机尾流及相互作用的实验研究[J].西华大学学报:自然科学版,2016,35(3):80-88.[8]Yang Rui,Wang Xiaoli,Wang Qiang,et al.Experimental study of wind turbine wake and the interaction in different layout scheme[J].Journal of Xihua University:Natural Science,2016,35(3):80-88.
[9]马剑龙,汪建文,刘雄飞,等.某新翼型风力机叶片的设计与气动性能试验[J].可再生能源,2013,31(9):63-68.[9]Ma Jianlong,Wang Jianwen,Liu Xiongfei,et al.Research on design of wind turbine blade with new airfoil and test of its aerodynamic performance[J].Renewable Energy Resources,2013,31(9):63-68.
[10]张兆顺.湍流[M].北京:国防工业出版社,2002.[10]Zhang Zhaoshun.Turbulent[M].Beijing:National Defense Industry Press,2002.