A numerical algorithm for acoustic noise generation is extended to 3D flows. The approach involves two parts comprising a viscous incompressible flow part and an inviscid acoustic part. In order to simulate noise generated from a wind turbine, the incompressible and acoustic equations are written in polar coordinates. The developed algorithm is combined with a so-called actuator-line technique in which the loading is distributed along lines representing the blade forces. Computations are carried out for the 500kW Nordtank wind turbine equipped with three LM19 blades.
Volume Subject Area:
Aerodynamics, Experiments and Modeling: Session II
Topics:
Acoustics,
Computation,
Wind turbines,
Algorithms,
Blades,
Flow (Dynamics),
Noise (Sound),
Actuators
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Copyright © 2001
by The American Institute of Aeronautics and Astronautics, Inc. and ASME
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