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The Aerodynamics of the Curled Wake: A Simplified Model in View of Flow Control

Journal Article · · Wind Energy Science Discussions
DOI:https://doi.org/10.5194/wes-2018-57· OSTI ID:1492501
 [1];  [1];  [1];  [1]
  1. National Renewable Energy Lab. (NREL), Golden, CO (United States)
+ Show Author Affiliations

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 large-eddy simulations using actuator disk and line models. The model is able to capture the curling mechanism for a turbine under uniform inflow and in the case of a neutral atmospheric boundary layer. Here, the model is then tested inside the FLOw Redirection and Induction in Steady State framework and provides excellent agreement with power predictions for cases with two and three turbines in a row.

Research Organization:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Wind Energy Technologies Office (EE-4WE)
Grant/Contract Number:
AC36-08GO28308
OSTI ID:
1492501
Report Number(s):
NREL/JA--5000-72098
Journal Information:
Wind Energy Science Discussions, Journal Name: Wind Energy Science Discussions Journal Issue: none Vol. none; ISSN 2366-7621
Publisher:
European Academy of Wind Energy - CopernicusCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (8)

Wind farm power optimization through wake steering journal July 2019
Initial Results From a Field Campaign of Wake Steering Applied at a Commercial Wind Farm: Part 1 posted_content February 2019
Optimizing wind farm control through wake steering using surrogate models based on high-fidelity simulations journal January 2020
Continued results from a field campaign of wake steering applied at a commercial wind farm – Part 2 journal January 2020
Wind Farm Modeling with Interpretable Physics-Informed Machine Learning journal July 2019
A Wake Modeling Paradigm for Wind Farm Design and Control journal August 2019
Large-Eddy Simulation of Yawed Wind-Turbine Wakes: Comparisons with Wind Tunnel Measurements and Analytical Wake Models journal November 2019
Initial results from a field campaign of wake steering applied at a commercial wind farm – Part 1 journal January 2019

Figures / Tables (10)

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Table 1(p. 13)table Table 1

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

17 WIND ENERGY
aerodynamics
control
wake
wind turbines
yaw