UWE Bristol Engineering showcase 2015
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Thamer Alanezi<br />
Mechanical <strong>Engineering</strong> (Beng)<br />
Project Supervisor<br />
Dr Abdessalem Bouferrouk<br />
Design of a Vertical Axis Wind Turbine for Urban Use<br />
Project summary<br />
How did mankind notice wind? Is it because of its impact on agriculture or the way it carries clouds and changes the weather?<br />
In this report a study of different air foils, power outputs and a design of a 3 straight shaped Blade Darrieus vertical axis wind turbine<br />
(VAWT) for house use in urban areas. The design was carried out using QBlade, Workbench and Fluent solver to establish a comparison<br />
for air foil parameters and ratios. Results of different air foils behaviour against angle of attack and a discussion of how different angles<br />
affect a specific air foil were presented.<br />
Project Objectives<br />
The reason behind this project is to design a<br />
computational fluid mechanics (CFD) model<br />
using ANSYS software and compare computer<br />
generated results to the theoretical ones.<br />
The purpose of this project is to provide a<br />
clear study of the vertical axis wind turbine.<br />
This project aims to explain how vertical axis<br />
wind turbine behaves and its durability when<br />
tested under different wind conditions.<br />
Investigating the components of the vertical<br />
axis wind turbine (VAWT) may improve the<br />
structure, lower structural weaknesses and<br />
increase the power output of the system.<br />
Figures<br />
Figures Show 3D visualisation of<br />
blades connected to the rotor,<br />
airfoil, pressure distribution on air<br />
foil NACA 0018, velocity on air<br />
foil NACA 0018 and Qblade view<br />
of air foil NACA 0018 at 15˚<br />
angle of attack with respect to<br />
changing value of power<br />
coefficient.<br />
Installation Location<br />
Met Office maps of wind speed<br />
average shows that the North West<br />
coast of Scotland, northern Welsh<br />
Bangor area and Cairngorms<br />
National Park Mountains have the<br />
highest values of data collected<br />
between 1981 and 2010.<br />
Previously mentioned areas have a<br />
wind speed average that ranges<br />
from 15 knots to even higher than<br />
25 knots. That range equals to 7.7<br />
m/s to higher than 13 m/s.<br />
Project Conclusion<br />
To sum up, QBlade software was facing crashes<br />
during analysis operations several times. That led to<br />
an introduction to the basic charts of lift-drag<br />
coefficients. Further work was curried using ANSYS<br />
Workbench modules of geometry, design modeller,<br />
mesh, fluent and results. Meshing module step was<br />
carried successfully for both NACA 0012 and NACA<br />
0018 air foils. The only problem stoped the<br />
investigation of the air foil NACA 0012 was that the<br />
Fluent solver continued iterations infinitely which<br />
terminated any further study of the sample. The<br />
VAWT design process relied on the selection of air foil<br />
NACA 0018 after looking at the analytical results<br />
maintained by both QBlade charts and Fluent results.<br />
Location of installation varies depending on many<br />
conditions but the report provided recommendations<br />
for several locations arranged by preference and wind<br />
speed. That decision was made to give the chance for<br />
comparison as final decision cannot be made until<br />
further contact with the related authorities.<br />
Generator choice was made after careful calculations<br />
for the ability and requirements of the design.
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