Modeling the effect of control on the wake of a utility-scale turbine via large-eddy simulation

Xiaolei Yang, Jennifer Annoni, Peter J Seiler Jr, Fotis Sotiropoulos

Research output: Contribution to journalConference article

4 Citations (Scopus)

Abstract

A model of the University of Minnesota EOLOS research turbine (Clipper Liberty C96) is developed, integrating the C96 torque control law with a high fidelity actuator line large- eddy simulation (LES) model. Good agreement with the blade element momentum theory is obtained for the power coefficient curve under uniform inflow. Three different cases, fixed rotor rotational speed ω, fixed tip-speed ratio (TSR) and generator torque control, have been simulated for turbulent inflow. With approximately the same time-averaged ω, the time- averaged power is in good agreement with measurements for all three cases. Although the time-averaged aerodynamic torque is nearly the same for the three cases, the root-mean-square (rms) of the aerodynamic torque fluctuations is significantly larger for the case with fixed ω. No significant differences have been observed for the time-averaged flow fields behind the turbine for these three cases.

Original languageEnglish (US)
Article number012180
JournalJournal of Physics: Conference Series
Volume524
Issue number1
DOIs
StatePublished - Jan 1 2014
Event5th Science of Making Torque from Wind Conference, TORQUE 2014 - Copenhagen, Denmark
Duration: Jun 18 2014Jun 20 2014

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large eddy simulation
turbines
wakes
torque
aerodynamics
momentum theory
tip speed
blades
rotors
flow distribution
generators
actuators
curves
coefficients

Cite this

Modeling the effect of control on the wake of a utility-scale turbine via large-eddy simulation. / Yang, Xiaolei; Annoni, Jennifer; Seiler Jr, Peter J; Sotiropoulos, Fotis.

In: Journal of Physics: Conference Series, Vol. 524, No. 1, 012180, 01.01.2014.

Research output: Contribution to journalConference article

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