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Advisor(s)
Abstract(s)
The current trend of increasing the electricity production from wind
energy has led to the installation of wind farms in areas of greater
orographic complexity, raising doubts on the use of simple, linear,
mathematical models of the fluid flow equations, so common in the
wind energy engineering. The present study shows how conventional
techniques, linear models and cup anemometers, can be
combined with flow simulation by computational fluid dynamics
techniques (nonlinear models) and measurements by sonic anemometers,
and discuss their relative merits in the characterisation of
the wind over a coastal region—a cliff over the sea. The computational
fluid dynamic techniques were particularly useful, providing a
global view of the wind flow over the cliff and enabling the
identification of separated flow regions, clearly unsuitable for
installation of wind turbines. These locations display a pulsating
flow, with periods between 1 and 7min, in agreement with sonic
anemometer measurements, and both a turbulence intensity and a
gust factor well above the wind turbine design conditions.
Description
Keywords
Wind energy engineering Computational fluid dynamics Turbine micro-siting
Citation
Palma, J.M.L.M.; Castro, F.A.; Ribeiro, Luís Frölén; Rodrigues, A.H.; Pinto, A.P. (2008). Linear and nonlinear models in wind resource assessment and wind turbine micro-siting in complex terrain. Journal of Wind Engineering and Industrial Aerodynamics. ISSN 0167-6105. 96:12, p. 2308-2326