Analysis of near wake by model wind turbine and porous disk

• Main Authors: Jyun-HaoFong, 馮俊皓
• Other Authors: Jiun-Jih Miau
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/17424484032592377334

碩士 === 國立成功大學 === 航空太空工程學系 === 102 === This research is experimented by measuring every point behind the model wind turbine and the porous disk under the uniform freestream flow condition and is analyzing the aerodynamic characteristics including thrust coefficient, velocity distribution and turbulence intensity to discuss wake characteristics and its development for the model wind turbine under different tip speed ratio and the porous disk under different porosity. The thrust coefficient is calculated by momentum theorem and actuator disc theorem and this method is proved by the porous disk in fifty percent. The result show that the thrust coefficient of the porous disk in fifty percent is about 0.61 and of the model wind turbine in tip speed ratio equals to 1.88 found is maximum about 0.124. Another work is to measure the sectional velocity of the model wind turbine and the single porous disk. The wake characteristics and development compared under different tip speed ratio for the model wind turbine and with two kind of porosity for the porous disk. Finally, there is a concept of simulating the model wind turbine with the porous disk.