Particle image velocimetry (PIV) measurements of tip vortex wake structure of wind turbine  

作　　者：肖京平 武杰 陈立 史喆羽 

机构地区：[1]College of Aeronautics,Northwestern Polytechnical University [2]China Aerodynamics Research and Development Center

出　　处：《Applied Mathematics and Mechanics(English Edition)》2011年第6期729-738,共10页应用数学和力学（英文版）

基　　金：Project supported by the National Basic Research Program of China (973 Program) (No. 2007CB714600)

摘　　要：Large-view flow field measurements using the particle image velocimetry （PIV） technique with high resolution CCD cameras on a rotating 1/8 scale blade model of the NREL UAE phase VI wind turbine are conducted in the engineering-oriented q53.2 m wind tunnel. The motivation is to establish the database of the initiation and development of the tip vortex to study the flow structure and mechanism of the wind turbine. The results show that the tip vortex first moves inward for a very short period and then moves outward with the wake expansion, while its vorticity decreases with time after being trailed from the trailing edge of the blade tip, and then increases continuously with the rapid rolling-up to form a strong tip vortex. The measurements also indicate that the downstream movement of the tip vortex is nearly linear in the very near wake under the test condition.Large-view flow field measurements using the particle image velocimetry （PIV） technique with high resolution CCD cameras on a rotating 1/8 scale blade model of the NREL UAE phase VI wind turbine are conducted in the engineering-oriented q53.2 m wind tunnel. The motivation is to establish the database of the initiation and development of the tip vortex to study the flow structure and mechanism of the wind turbine. The results show that the tip vortex first moves inward for a very short period and then moves outward with the wake expansion, while its vorticity decreases with time after being trailed from the trailing edge of the blade tip, and then increases continuously with the rapid rolling-up to form a strong tip vortex. The measurements also indicate that the downstream movement of the tip vortex is nearly linear in the very near wake under the test condition.

关 键 词：wind turbine particle image velocimetry （PIV） tip vortex flow field 

分 类 号：TM614[电气工程—电力系统及自动化]