flapFOAM RANS
12 RANS simulations of a uniform non-rotating actuator disk were carried out using OpenFOAM version 2.1.1, with k-e turbulence model including additional dissipation near the rotor, a la El-Kasmi and Masson 2008. These 12 simulations form a data base, from which the wake deficit data is interpolated at arbitrary inflow velocities at hub height. This way CFD simulations are used to define a numerical wake model. flapFOAM is a new wind farm modelling software that is currently in development at Fraunhofer IWES.
The wake interpolates pre-calculated single-rotor results from actuator disk RANS simulations. The resulting numerical wake model is treated then as in typical engineering model codes; the wake superposition model is the square root of the square of deficits. The background field is a log-profile for neutral stratification.
The wake interpolates pre-calculated single-rotor results from actuator disk RANS simulations. The resulting numerical wake model is treated then as in typical engineering model codes; the wake superposition model is the square root of the square of deficits. The background field is a log-profile for neutral stratification.
A. El Kasmi and C. Masson, "An extended model for turbulent flow through horizontal axis wind turbines." Journal of Wind Engineering and Industrial Aerodynamics, 96(1):103–122, 2008.
J. Schmidt and B. Stoevesandt, "WIND FARM LAYOUT OPTIMIZATION WITH WAKES
FROM FLUID DYNAMICS SIMULATIONS", EWEA 2014, proceedings publication
J. Schmidt and B. Stoevesandt, "Modelling complex terrain effects for wind farm layout optimization", The Science of Making Torque From Wind 2014, proceedings publication
Stanislav Rockel, Elizabeth Camp, Jonas Schmidt, Joachim Peinke, Raul Bayoan Cal and Michael Holling, "Experimental Study on Influence of Pitch Motion on the Wake of a Floating Wind Turbine Model", Energies 2014, 7, 1954-1985; doi:10.3390/en7041954
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