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Title: The aerodynamics of the curled wake: a simplified model in view of flow control

Abstract

Abstract. When a wind turbine is yawed, the shape of the wake changes and a curled wake profile is generated. The curled wake has drawn a lot of interest because of its aerodynamic complexity and applicability to wind farm controls. The main mechanism for the creation of the curled wake has been identified in the literature as a collection of vortices that are shed from the rotor plane when the turbine is yawed. This work extends that idea by using aerodynamic concepts to develop a control-oriented model for the curled wake based on approximations to the Navier–Stokes equations. The model is tested and compared to time-averaged results from large-eddy simulations using actuator disk and line models. The model is able to capture the curling mechanism fora turbine under uniform inflow and in the case of a neutral atmospheric boundary layer. As a result, the model is then incorporated to the FLOw Redirection and Induction in Steady State (FLORIS)framework and provides good agreement with power predictions for cases with two and three turbines in a row.

Authors:
ORCiD logo [1];  [1]; ORCiD logo [1]; ORCiD logo [1]
  1. National Renewable Energy Lab. (NREL), Golden, CO (United States)
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Wind Energy Technologies Office (EE-4WE)
OSTI Identifier:
1500075
Report Number(s):
NREL/JA-5000-73451
Journal ID: ISSN 2366-7451
Grant/Contract Number:  
AC36-08GO28308
Resource Type:
Accepted Manuscript
Journal Name:
Wind Energy Science (Online)
Additional Journal Information:
Journal Name: Wind Energy Science (Online); Journal Volume: 4; Journal Issue: 1; Journal ID: ISSN 2366-7451
Publisher:
European Wind Energy Association - Copernicus
Country of Publication:
United States
Language:
English
Subject:
17 WIND ENERGY; yaw; wake; wind turbines; aerodynamics; control

Citation Formats

Martínez-Tossas, Luis A., Annoni, Jennifer, Fleming, Paul A., and Churchfield, Matthew J. The aerodynamics of the curled wake: a simplified model in view of flow control. United States: N. p., 2019. Web. doi:10.5194/wes-4-127-2019.
Martínez-Tossas, Luis A., Annoni, Jennifer, Fleming, Paul A., & Churchfield, Matthew J. The aerodynamics of the curled wake: a simplified model in view of flow control. United States. doi:10.5194/wes-4-127-2019.
Martínez-Tossas, Luis A., Annoni, Jennifer, Fleming, Paul A., and Churchfield, Matthew J. Tue . "The aerodynamics of the curled wake: a simplified model in view of flow control". United States. doi:10.5194/wes-4-127-2019. https://www.osti.gov/servlets/purl/1500075.
@article{osti_1500075,
title = {The aerodynamics of the curled wake: a simplified model in view of flow control},
author = {Martínez-Tossas, Luis A. and Annoni, Jennifer and Fleming, Paul A. and Churchfield, Matthew J.},
abstractNote = {Abstract. When a wind turbine is yawed, the shape of the wake changes and a curled wake profile is generated. The curled wake has drawn a lot of interest because of its aerodynamic complexity and applicability to wind farm controls. The main mechanism for the creation of the curled wake has been identified in the literature as a collection of vortices that are shed from the rotor plane when the turbine is yawed. This work extends that idea by using aerodynamic concepts to develop a control-oriented model for the curled wake based on approximations to the Navier–Stokes equations. The model is tested and compared to time-averaged results from large-eddy simulations using actuator disk and line models. The model is able to capture the curling mechanism fora turbine under uniform inflow and in the case of a neutral atmospheric boundary layer. As a result, the model is then incorporated to the FLOw Redirection and Induction in Steady State (FLORIS)framework and provides good agreement with power predictions for cases with two and three turbines in a row.},
doi = {10.5194/wes-4-127-2019},
journal = {Wind Energy Science (Online)},
number = 1,
volume = 4,
place = {United States},
year = {2019},
month = {3}
}

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