Improvement on a Blade Performance of a Vertical-Axis Wind Turbine

• Main Authors: Jhe-YuLi, 李哲語
• Other Authors: Jiun-Jih Miau
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/95449437833273217606

碩士 === 國立成功大學 === 航空太空工程學系碩博士班 === 101 === For more understanding of the aerodynamic performance of the second generation VAWT, experiments were carried out to measure the surface pressure distribution of the airfoil that used by the VAWT. The VAWT is consist of three or six straight blades, each blade is 1.2m in height, 0.15m in chord length and 1.2m in diameter. The vortex generators and sandpapers had been applied on the upper surface and leading edge respectively, of the airfoil for improving its performance.Through the oil flow visualization and surface pressure measurement experiments, we can get and compare the aerodynamic and visualization results. And, the starting torque by calculating aerodynamic results in double-multiple streamtube method is presented. According to the results, the starting torque in turbulent condition is 200% to 400% greater than without grid when U=6.57m/s, for in some configurations, Installing VGs can improve the performance under the present conditions of U=6.57m/s and 9.44m/s.