Comparison of Mean and Dynamic Wake Characteristics between Research-Scale and Full-Scale Wind Turbines
Abstract
Comprehensive utility-scale wake measurements from commercial wind plants are difficult to obtain. As a result, research in wind farm aerodynamics is often based on smaller-scale measurements and on numerical experiments. It is therefore crucial for the scientific community to understand how results compare across scales. In this work, three actuator-line large-eddy simulations are performed to investigate the sensitivity of mean and dynamic wake characteristics to changes in hub height (for the same turbine model) and in rotor size and properties (for a research-scale and a land-based-scale rotor at the same hub height). Results reveal that ground proximity has a large effect on wake expansion via turbulent transport of axial momentum and on the magnitude of lateral and vertical meandering. The rotor-size experiment suggests that wakes from different-scale turbines expand similarly when not limited by the ground, but that the meandering magnitude is not easily translatable across scales. Lastly, the short-rotor wake recovers faster than the tall-rotor wake, but the far wakes of the different-sized rotors at the same absolute height are scalable.
- Publication Date:
- Research Org.:
- National Renewable Energy Laboratory (NREL), Golden, CO (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Wind and Water Technologies Office (EE-4W)
- OSTI Identifier:
- 1462465
- Report Number(s):
- NREL/JA-5000-71372
Journal ID: ISSN 1742-6588; TRN: US1902179
- Grant/Contract Number:
- AC36-08GO28308
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Physics. Conference Series
- Additional Journal Information:
- Journal Volume: 1037; Journal ID: ISSN 1742-6588
- Publisher:
- IOP Publishing
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 17 WIND ENERGY; large eddy simulation; torque; wakes; wind power; wind turbines
Citation Formats
Doubrawa, Paula Moreira, Martinez-Tossas, Luis A., Quon, Eliot W., Moriarty, Patrick J., and Churchfield, Matthew J. Comparison of Mean and Dynamic Wake Characteristics between Research-Scale and Full-Scale Wind Turbines. United States: N. p., 2018.
Web. doi:10.1088/1742-6596/1037/7/072053.
Doubrawa, Paula Moreira, Martinez-Tossas, Luis A., Quon, Eliot W., Moriarty, Patrick J., & Churchfield, Matthew J. Comparison of Mean and Dynamic Wake Characteristics between Research-Scale and Full-Scale Wind Turbines. United States. https://doi.org/10.1088/1742-6596/1037/7/072053
Doubrawa, Paula Moreira, Martinez-Tossas, Luis A., Quon, Eliot W., Moriarty, Patrick J., and Churchfield, Matthew J. Tue .
"Comparison of Mean and Dynamic Wake Characteristics between Research-Scale and Full-Scale Wind Turbines". United States. https://doi.org/10.1088/1742-6596/1037/7/072053. https://www.osti.gov/servlets/purl/1462465.
@article{osti_1462465,
title = {Comparison of Mean and Dynamic Wake Characteristics between Research-Scale and Full-Scale Wind Turbines},
author = {Doubrawa, Paula Moreira and Martinez-Tossas, Luis A. and Quon, Eliot W. and Moriarty, Patrick J. and Churchfield, Matthew J.},
abstractNote = {Comprehensive utility-scale wake measurements from commercial wind plants are difficult to obtain. As a result, research in wind farm aerodynamics is often based on smaller-scale measurements and on numerical experiments. It is therefore crucial for the scientific community to understand how results compare across scales. In this work, three actuator-line large-eddy simulations are performed to investigate the sensitivity of mean and dynamic wake characteristics to changes in hub height (for the same turbine model) and in rotor size and properties (for a research-scale and a land-based-scale rotor at the same hub height). Results reveal that ground proximity has a large effect on wake expansion via turbulent transport of axial momentum and on the magnitude of lateral and vertical meandering. The rotor-size experiment suggests that wakes from different-scale turbines expand similarly when not limited by the ground, but that the meandering magnitude is not easily translatable across scales. Lastly, the short-rotor wake recovers faster than the tall-rotor wake, but the far wakes of the different-sized rotors at the same absolute height are scalable.},
doi = {10.1088/1742-6596/1037/7/072053},
journal = {Journal of Physics. Conference Series},
number = ,
volume = 1037,
place = {United States},
year = {Tue Jun 19 00:00:00 EDT 2018},
month = {Tue Jun 19 00:00:00 EDT 2018}
}
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Works referenced in this record:
Quantifying error of lidar and sodar Doppler beam swinging measurements of wind turbine wakes using computational fluid dynamics
journal, January 2015
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SWiFT site atmospheric characterization
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Works referencing / citing this record:
Large eddy simulations of floating offshore wind turbine wakes with coupled platform motion
journal, July 2019
- Johlas, H. M.; Martínez-Tossas, L. A.; Schmidt, D. P.
- Journal of Physics: Conference Series, Vol. 1256