题目：Study on aerodynamic forces and flow field of a straight-bladed vertical axis wind turbine关于直线翼垂直轴风车的空气动力学及流场的研究
报告人：李庆安研究员（日本国立三重大学）
时间：2016年5月4日14：00
地点：流体力学楼C12-619学术报告厅
主办单位：国际合作交流处、科协、江苏省风力机设计高技术研究重点实验室、航空宇航学院
报告人简介：
李庆安，男，1985年11月出生。2015年03月日本国立三重大学系统工学博士。现为日本国立三重大学机械工学科研究员。长期从事垂直轴风力发电机标准化及高效化的开发与研究、水平轴风力发电机尾流的研究、远洋风力发电机空气动力学研究。参与日本文部省重大课题3项，发表学术期刊论文20余篇（其中SCI一区收录论文8篇），会议论文10余篇。Energy, Renewable Energy,Journal of Wind Engineering & Industrial Aerodynamics等国际期刊审稿人。日本机械学会、发动机机械学会、风能协会会员。
报告简介：
本论文目的在于利用风洞试验和现场测试开发一种适用于低风速区域、高乱流强度下有着优越性能的直线翼垂直轴风机。本研究中采用的风车翼型是NACA0021,叶片数量2-5枚.首先利用风洞试验采用多点压力测量装置探索了风车在运转过程中的空气动力学特征。然后分别在风洞中利用LDV技术，在现场测试中采用三杯风速测量仪考察了风车的出力性能以及流场特性。通过研究可以发现，风车的最优发电系数伴随着叶片数量的增加而降低。该项研究对推动VAWT的发展具有重要的理论意义。Small wind turbine performance and safety standard for straight-bladed Vertical Axis Wind Turbine (VAWT) have not been developed in the world because of the lack of fundament experimental data. This study focuses on the evaluation of aerodynamic forces and flow field in wind tunnel and filed experiments. In the present study, the test airfoil of blade is symmetry airfoil of NACA 0021 and the number of blades is from two to five. Pressure acting on the surface of rotor blade is measured during rotation by multiport pressure devices and transmitted to a stationary system through wireless LAN. And then, the aerodynamic forces (tangential force, normal force et al.) are discussed as a function of azimuth angle, achieving a quantitative analysis of the effect of numbers of blades. Moreover, the flow field characteristics are obtained through measuring the wind velocity by Laser Doppler Velocimeter (LDV) system in the wind tunnel experiment and three-cup type anemometers in field test. As a result, it is clarified that the power coefficient decreases with the increase of numbers of blades. Furthermore, the power which is absorbed from wind by wind turbine mainly depends on upstream region. These results provided a theoretical guiding significance to the development of VAWT simplified.
