风剪切和动态来流对水平轴风力机尾迹和气动性能-中国电机工程学报.PDF

第 32 卷 第 14 期 中 国 电 机 工 程 学 报 Vol.32 No.14 May 15, 2012 122 2012 年 5 月 15 日 Proceedings of the CSEE ©2012 Chin.Soc.for Elec.Eng. 文章编号：0258-8013 (2012) 14-0122-06 中图分类号：TK 83 文献标志码：A 学科分类号：470·20 风剪切和动态来流对水平轴风力机尾迹和 气动性能的影响 周文平，唐胜利，吕红 (重庆大学动力工程学院，重庆市 沙坪坝区 400030) Effect of Transient Wind Shear and Dynamic Inflow on the Wake Structure and Performance of Horizontal Axis Wind Turbine ZHOU Wenping, TANG Shengli, LÜ Hong (College of Power Engineering, Chongqing University, Shapingba District, Chongqing 400030, China) ABSTRACT: An investigation of the effect of steady wind 算结果能够为风力机优化设计提供支持。 shear and transient dynamic inflow wind on the wake structure 关键词：水平轴风力机；自由尾迹；动态来流；气动性能 and performance characteristics of a horizontal axis wind turbine rotor was presented. A computational method based on 0 引言 Weissinger-L lifting surface model with a time-marching free 风力机在自然大气中工作，来流风向改变(风偏 vortex methodology was used for this purpose. The code was validated using the experimental data obtained from the NREL 航) 、阵风、大气紊流、边界层效应(风剪切) 以及上 UAE experiments. Three different inflow cases, i.e. steady 游风力机尾迹和自身塔架等的影响，使得风轮在多 wind shear, transient extreme wind shear (EWS) and extreme 数情况下处于非稳态的运行环境[1] 。对叶片周围流 operating gust (EOG), were investigated. The results show that 动，尤其是尾迹区流动的准确模拟，是风力机气动 the existence of the wind shear in the freestream can create 性能分析的关键。 substantial asymmetries and non-periodicities in the structure