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Wind Energy Science The interactive open-access journal of the European Academy of Wind Energy
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Preprints
https://doi.org/10.5194/wes-2020-33
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/wes-2020-33
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

  03 Mar 2020

03 Mar 2020

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A revised version of this preprint was accepted for the journal WES and is expected to appear here in due course.

Theory and Verification of a new 3D RANS Wake Model

Philip Bradstock and Wolfgang Schlez Philip Bradstock and Wolfgang Schlez
  • ProPlanEn Ltd, 71-75 Shelton Street, WC2H 9JQ London, UK

Abstract. This paper details the background to the WakeBlaster model: a purpose built, parabolic three-dimensional RANS solver, developed by ProPlanEn. WakeBlaster is a field model, rather than a single turbine model; it therefore eliminates the need for an empirical wake superposition model. It belongs to a class of very fast (a few core seconds, per flow case) mid-fidelity models, which are designed for industrial application in wind farm design, operation and control.

The domain is a three-dimensional structured grid, with approximately 80 nodes covering the rotor disk, by default. WakeBlaster uses eddy viscosity turbulence closure, which is parameterized by the local shear, time-lagged turbulence development, and stability corrections for ambient shear and turbulence decay. The model prescribes a profile at the end of the near-wake, and the spatial variation of ambient flow, by using output from an external flow model.

The WakeBlaster model is verified, calibrated and validated using a large volume of data from multiple onshore and offshore wind farms. This paper presents example simulations for one offshore wind farm.

Philip Bradstock and Wolfgang Schlez

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Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Philip Bradstock and Wolfgang Schlez

Philip Bradstock and Wolfgang Schlez

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Latest update: 29 Oct 2020
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Short summary
The ProPlanEn team developed WakeBlaster, a new very fast numerical model for simulating the power output of wind farms. Accurate modelling of the waked flow enables the reduction of wind farm losses. By modelling the whole wind farm, WakeBlaster replaces simpler models which superimpose symmetrical solutions of the flow behind individual wind turbines. The paper describes the fundamental equations, discusses the scalability of the solution, and demonstrates the 3D flow in an offshore wind farm.
The ProPlanEn team developed WakeBlaster, a new very fast numerical model for simulating the...
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