【摘要】 风力机叶片处于偏航工况时,涡量值随工况因素变化显著,叶尖涡涡量值难以识别,相关的实验研究成果也比较少。针对该现状,文章提出了新的涡量值提取方法,并采用高频PIV设备,以直径为1.4 m的分布式水平轴风电叶片为实验模型,开展了相关叶尖涡特征测试;揭示了来流风速、叶片转速、偏航角度变化对叶尖涡涡量值影响的敏感性和影响规律。新方法的提出,对基于实验手段开展的偏航条件下叶尖涡涡量值特征分析,具有一定的借鉴意义;相关结论的获得,可对此前一些研究人员所获得的彼此相悖性结论作出验证;相关实验数据的获得,可为风力机开发中亟待解决的流固耦合主控方程有效解耦合方法的探索,提供可靠的实验数据。更多还原

【Abstract】 A new method of vortex value extraction was proposed for the technical difficulty of identifying the tip vortex when the blade was in yaw condition, and the influence of the inflow wind speed, the blade speed and the yaw angle on the tip vortex were revealed by using the high frequency PIV equipment to test a distributed horizontal axis wind turbine blade with diameter 1.4 m based on the fact that the tip vortex varies significantly along with the operating conditions,but the related experimental results are still few. The new method has a certain reference value for the characteristics analysis of the tip vortex under the yaw condition based on the experimental means, the relevant conclusions can be used to verify the reliability of the conclusions obtained by some researchers before, and the experimental data obtained can provide reliable experimental data support for the exploration of the effective decoupling method of the fluid structure coupling master control equation which is needed to be solved in the development of wind turbine now.更多还原