Extract local angle of attack on wind turbine blades
Extract local angle of attack on wind turbine blades
Table of Contents
1 Extract local angle of attack on wind turbine blades
keywords: local AOA, wind turbine
- The inverse BEM method [13, 14], which uses the pre-determined local forces to calculate
the local induction.
- Using CFD data to obtain the
annular average
of the axial velocity (and thereby the
induction a) at a given radial position in the rotor plane [15, 16, 17].
- Using CFD data to obtain the the axial velocity at a given radial position in the rotor plane
at the location of the blade (aB). This method is similar to method (2.).
- Determination of AOA by comparison of high-pressure-side CP distributions of a 3D case
with a 2D case with a known AOA . Methods (1.) and (4.) require sectional force coefficients and pressure distributions, respectively, making them suitable with experimental data where sectional force coefficients and pressure distributions are often the only data available. On the other hand, methods (2.) and (3.) require detailed flow field information upstream and downstream of the rotor, making them more suitable where full rotor CFD data is available. 1
1.1 References
2018 Eva Jost Angle of Attack (AoA), turbine, Extracting the angle of attack on rotor blades from CFD simulations
2017 Jost, Eva, et al. "Extracting the angle of attack on rotor blades from CFD simulations." Wind Energy (2017).
2018 Rahimi, Hamid, et al. "Evaluation of different methods for determining the angle of attack on wind turbine blades with CFD results under axial inflow conditions." Renewable Energy 125 (2018): 866-876.
Footnotes:
2014 S Guntur, N N Sorensen An evaluation of several methods of determining the local angle of attack on wind turbine blades
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