Study on the influence of pentagonal turbine tail on the rotational behavior of a horizontal-axis wind turbine

• Main Authors: Pei-Sen Yin, 尹培森
• Other Authors: Huei-Chu Weng
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/63771583448953800899

碩士 === 中原大學 === 機械工程研究所 === 104 === This thesis conducts the influence of pentagonal turbine tail on the rotational behavior of a horizontal-axis wind turbine. The main purpose is to investigate the influence of pentagonal turbine tail on its rotation time, oscillation time and rotational torque for different wind speeds. Five kinds of pentagonal tail geometries are made with galvanized iron sheet. All the tails are connected to the horizontal-axis wind turbine, and the data of the rotation time, oscillation time and rotational torque are measured in a wind tunnel for various wind speeds. According to the integrated data, a suitable tail geometry is found out, and the rotational behavior of the wind turbine is tested in the wind tunnel for different tail areas on the basis of the suitable tail geometry in the wind tunnel. Moreover, ANSYS Workbench is used to analyze the pressure and streamline distributions near the tails in order to find out the rotational behavior of the horizontal-axis wind turbine with a pentagonal tail. Results show that if the pentagonal tail head fraction is 75%, the rotational performance is optimal. Increased tail area can enhance the rotational torque and then reduce the rotational time; however, there is no clear relationship between tail area and oscillation time. In addition, this thesis further investigates the effects of tail boom length and tail boom angle. It is found that as the tail boom length decreases, the rotational behavior could be better; however, the tail boom angle has an insignificant effect on the rotational behavior.