Aerodynamic Analyses of Different Wind Turbine Blade Profiles
For thousands of years mankind is utilizing wind energy.
Increasing world population and increasingly reducing oil reserves and
resulting requirement for clean, reliable, renewable energy systems intensifies
the requirement for wind energy in long term. Nowadays, wind turbines
are used for transforming that energy into electrical and mechanical energy.
In order to gain from a wind turbine economically in maximum amounts performance
data based on blade cross-section characteristics must be found. In the
present study angle of attacks for 4 various blade profiles, Re numbers
and correlations between lift and drag rates are investigated. Snack 2.0,
computer software has been used for the calculation of lift, drag, moment
and minimum pressure coefficients. For all evaluated blade profiles and
all Re rates in the provided highest sliding rates most convenient angle
of attack was determined in the range of 3° and 9°. According
to lift-drag correlation in constant drag value as long as Re rate is
higher also lift is intensified. Highest drag rates found corresponding
to Re 20000.
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