Southern Taiwan University
Graduate Student Degree Examination
Department：Graduate School of Mechanical Engineering
Name：Chen, Ying-Hsien
Student I.D. no：M9610115
Exam Date/Time：1/8/2011 10:30 AM
Exam Location：K201c at STUT
Thesis topic： The Analysis of Maximum Torque and Variable Setting Angle
for
Straight-Bladed Vertical Axis Wind Turbines
ABSTRACT
In general, wind turbine is divided to Horizontal type and Vertical type according to the
direction of axis and wind direction. Large scale is the current of horizontal type, on the other
hand, vertical type goes to small scale. Also, Vertical Axis Wind Turbine(VAWT) is divided
to drag and lift type. Lift type is the main stream because of the advantage of coefficient.
Moreover, lift type includes egg-shaped and straight blade. Since the manufacturing process
of straight blade is easier than Egg-shaped blade, the development of trend is straight-bladed
vertical axis wind turbine.
However, the disadvantage of coefficient causes the bottleneck problem of development
on straight-bladed vertical axis wind turbine. The purpose of this thesis is to concentrate on
most commonly used NACA airfoil and to analyze the influence of torque and coefficient by
variation setting angle which is under different wind speed and rotating speed.
The thesis analyze the TW patents of variable setting angle vertical axis wind turbine,
derive the mathematical model of torque for single blade, and analyze the range of positive
torque value of blade. The result of wind speed, maximum torque, and the curve of setting
angle could be the design data of variable setting angle straight-bladed vertical axis wind
turbine.
Keyword: Straight-Bladed Vertical Axis Wind Turbine、Analysis of Torque、Analysis
of Variable Setting Angle、NACA Airfoil
【S1.論文摘要 Thesis abstract】