Journal
PHYSICA D-NONLINEAR PHENOMENA
Volume 280, Issue -, Pages 14-21Publisher
ELSEVIER
DOI: 10.1016/j.physd.2014.04.004
Keywords
Wind energy; Stochastic analysis; Fokker-Planck equation; Markov properties; Turbulence
Categories
Funding
- Directorate For Engineering
- Div Of Chem, Bioeng, Env, & Transp Sys [1034581] Funding Source: National Science Foundation
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Hot-wire velocity signals from a model wind turbine array boundary layer flow wind tunnel experiment are analyzed. In confirming Markovian properties, a description of the evolution of the probability density function of velocity increments via the Fokker-Planck equation is attained. Solution of the Fokker-Planck equation is possible due to the direct computation of the drift and diffusion coefficients from the experimental measurement data which were acquired within the turbine canopy. A good agreement is observed in the probability density functions between the experimental data and numerical solutions resulting from the Fokker-Planck equation, especially in the far-wake region. The results serve as a tool for improved estimation of wind velocity within the array and provide evidence that the evolution of such a complex and turbulent flow is also governed by a Fokker-Planck equation at certain scales. (C) 2014 Elsevier B.V. All rights reserved.
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