1 - 8 of 8 articles
Two one-dimensional wind models have been tested for their ability to describe the wind profile at sea up to a height of 125 m. The first model is based on Monin-Obukhov similarity theory with due consideration of effects of surface waves. The second model is a combination of Monin-Obukhov...
Numerical computations are carried out for the NREL S809 airfoil. The flow is modelled using an unsteady incompressible Reynolds Averaged Navier-Stokes solver. Two turbulence models (SST k/ω of Menter and RNG k/ε) are applied to close the RANS equations. All computations are performed assuming...
A preliminary analysis on the impact of wind power penetration into the grid is presented. This develops consistent simulation tools to analyze the steady-state impact of the interconnection of wind turbine generators to the utility grid for (i) power flow analysis, and (ii) reactive power...
The goal of this paper is to demonstrate the advantages of coupling the integrated Monin-Obukhov similarity functions with an algebraic turbulence equation to resolve the profiles of temperature and velocity in the atmospheric surface layer. The latter equation is derived using the definition of...
The importance of characterizing the wind-shear at a given site for a utility-scale wind turbine cannot be overemphasized. Such characterization is needed for an accurate prediction of its power output. Thus, the objective of this work based on the use of several US tall tower wind data sets was...
A vertical-axis ‘sailwing’ windmill is developed for autonomous wind-powered water-pumping. To determine the optimum design configuration of the rotor, various model test were carried out in a wind tunnel. The variable parameters were the shape and number of sails. The results favoured a...
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