II
Abstract
Because the traditional resources are getting less and less, lots of countries focus on
new resources and the wind resource is favorite. Blades decide efficiency of wind turbine as
the “heart” of energy transforming of wind turbine. High efficiency and power, special
aerofoil for wind turbine and noise were focused on by the researchers. However the steps
of wind turbine design were very complex and their sizes were very large, so it was very
hard for high efficiency wind turbines design. In this paper, the traditional design methods
and the fast developing CFD methods were combined, and a good designing system was set
up by good computation soft——MATLAB. This had good meaning for shorting wind
turbine design.
Compared and analyzed Glaurt method with Wilson method considering the
characteristics of wind turbine, a Wilson method design theory considering the tip loss was
showed; the solving steps of Wilson method were analyzed; a programmer was written with
MATLAB language .The complex problem of hand-design was avoided by this programmer,
and it was very quick and useful using this programmer. And a three blades 10KW
miniature wind turbine was design in this paper for some reference in the future research.
Numerical simulation using FLUENT software based on solving 3d Reynolds average
steady Navier-Stocks equations with SST K-ω turbulent model and mixing plane was used
for the contact planes. Compared numerical results with the experiments Performance, the
numerical error was in 5%, proving the validity of the calculation.
The different inlet velocities impacting power factor were using to study the out
performances of wind turbine. And the good running area was given by analyzing the
numerical results and the characteristics of wind turbine. At the same time, the pressure
coefficient distributing rule and blade stalling characteristics were shown.
In the end, the directions and methods of profound research through the CFD
analytical result and present state of wind turbine were pointed out.
Keywords: wind turbine; blade; MATLAB; numerical simulation; outflow
