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Modeling of wind turbine vortex generators in considering the inter-effects between arrays
Vortex generators (VGs) are commonly placed on wind turbine blades to delay flow separation in the boundary layer. VGs can be parametrically modeled in computational fluid dynamics for effective and efficient simulations of wind blade flow fields. Many researchers have studied the vortex circulation...
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Published in: | Journal of renewable and sustainable energy 2017-09, Vol.9 (5) |
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Main Authors: | , , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | Vortex generators (VGs) are commonly placed on wind turbine blades to delay flow
separation in the boundary layer. VGs can be parametrically modeled in computational fluid
dynamics for effective and efficient simulations of wind blade flow fields. Many
researchers have studied the vortex circulation created by VGs and created various
parametric models used with the Navier-Stokes equations, but most of them are based on a
single winglet of VGs and do not include the inter-effects between the winglets. This
paper proposes a parameterized VG array model based on counter-rotating VGs, which
properly takes into account the inter-effects between winglets. Two cases, i.e., a plate
with a pair of VGs and a DU-W2–250 blade segment with five pairs of VGs, are investigated
to validate this model; the array type parametric model is in closer agreement with
experimental data than traditional models. Compared to the solid VG model, the array type
model has similar streamlines and surface pressure coefficients on the suction surface.
The array type VG model can effectively reduce the number of grid points and yield highly
accurate predictions of wind turbine blade aerodynamic characteristics. |
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ISSN: | 1941-7012 1941-7012 |
DOI: | 10.1063/1.4997039 |