Saarblitz, Wind farm in HDR, flickr.com, creative commons by-nc-sa 2.0

flapFOAM RANS

Latest version

flapFOAM RANS

Submitted by Jonas Schmidt on May 5, 2015 - 10:53am
Main hypothesis

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.

Software
Solver
flapFOAM
License
Regime
Turbulence
Turbulence closure
Turbulence model

k-epsilon with additional dissipation near the rotor disk (El Kasmi and Masson, 2008)

Atmospheric boundary layer
Range
Coriolis
No
Atmospheric Stability
Atmospheric Stability
No
Canopy
Forest canopy
No
Wind farm
Wind turbine
Yes
Rotor model
Wake model
Wind farm range
Additional information

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.

Remarks

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.

References

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

Content Visibility

Public

Versions