Siting in Forested and Complex Terrain (JM)
More and more turbines are erected in forested and complex terrain, i.e. terrain with steep slopes and sudden roughness changes. We want to model the turbulent flow under these circumstances more accurately with the focus on wind energy. A forest module, taking into account the distributed drag forces of the trees and developed by one of the project participants [16], will be implemented into EllipSys3D, and a linearized version will be implemented in the commercial software WAsP Engineering. We also look to characterize the flow over complex terrain through appropriate use, combination, and extension of existing methods and theories for turbulence closure; this will account for interactions among the range of spatial scales relevant to wind turbines and give a more accurate description of inflow conditions. Such modelling will be done with due consideration of the dynamics of the atmospheric boundary layer, while also considering computational cost. The simulations will take into account the effects of stratification of the atmospheric boundary layer, which is linked to Task 5.
Expected results: New insight about the interference between turbines and terrain, and more reliable predictions of wind energy production and wind turbine loads in complex terrain.
Milestones; Task 4 (JM)
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Milestone
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Description
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Month
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Status
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M18
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Validation of complex terrain flow models using data from the Bolund experiment and the Vestas India site.
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6
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Completed
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|
M19
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Beta version of terrain flow solver available to industry partner Vestas.
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7
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Completed
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M20
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Beta version of forest model available to industry partner Vestas.
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12
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Completed
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M21
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Forest model Version-1.0 using parametrization from SCADIS.
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24
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Completed
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|
M22
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Terrain flow model that includes atmospheric stratification.
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40
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Completed
|
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M23
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Parametric study of the mutual turbine/terrain influence. (Using Actuator Disk/Line, both with RANS and LES)
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44
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Pending
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References