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Benchmarking of a Free Vortex Wake Model for Prediction of Wake Interactions
35th Wind Energy Symposium, 2017Abstract Turbine-wake interactions pose significant challenges in the development of wind farms. These interactions can lead to an increase in wind energy cost through reduction in wind farm power efficiency as well as a reduction of functional turbine lifetime.
Kelsey Shaler +2 more
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Modeling Dynamic Stall for a Free Vortex Wake Model
Wind Engineering, 2015Floating offshore wind turbines in deep waters offer significant advantages to onshore and near-shore wind turbines. However, due to the motion of floating platforms in response to wind and wave loading, the aerodynamics are substantially more complex.
Evan M. Gaertner, Matthew A. Lackner
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Wake structure analysis of wind turbines based on a free vortex wake model
Mechanics and Mechanical Engineering, 2016Zhen-Zhou Zhao
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Wake Effects of Free-Wake Model on Aeroelastic Behavior of Hovering Rotors
Journal of Aircraft, 2011The wake effects on aeroelastic deflections and aerodynamics for the isotropic and composite rotor blades have been investigated. To take into account the large deflections and rotations of rotor blades, a large-deflection beam modelwas used. A free-wake model basedon vortex-lattice method wasused to obtain the aerodynamic forces while considering wake
Yoo, SJ Yoo, Seung-Jae +2 more
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Wake Interaction Effects Using a Parallelized Free Vortex Wake Model
34th Wind Energy Symposium, 2016Turbine-wake interactions pose significant challenges in the development of optimal wind farm configurations. These interactions can lead to a marked reduction in wind farm power efficiency as well as an increase in structural loading, which reduces the functional lifetime.
Kelsey Shaler +2 more
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Preliminary Study on Wake Interaction Effects Using a Free Vortex Wake Model
33rd Wind Energy Symposium, 2015Wind energy is a renewable energy option that has made great advances in recent years. However, there are several issues that limit its growth. A significant challenge is wind farm configuration, where the energy density in the farm is limited due to interactions between turbines caused by the shed wakes.
Kelsey Shaler +2 more
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Time-accurate modeling of rotor wakes using a free-vortex wake method
18th Applied Aerodynamics Conference, 2000The stability, accuracy and convergence of time-marching algorithms for free-vortex rotor wake calculation is examined. A linearized analysis is used to determine the basic stability characteristics. The vortex-induced velocities are calculated through application of the Biot-Savart law using standard straight-line vortex segmentation. This approach is
Mahendra Bhagwat, J. Leishman
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Wake characterization of a free-flying model helicopter in ground effect
Proceedings of the Vertical Flight Society 80th Annual Forum, 2019Measurements of the flow field around a free-flying model helicopter in ground effect for both quasi-steady and unsteady maneuvering flights were performed using stereoscopic particle image velocimetry (PIV). The wake features for hover and forward flight at low advance ratios were characterized and changing flow patterns like recirculation and
Schwarz, Clemens +3 more
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Unsteady Free-Wake Vortex Particle Model for HAWT
AIP Conference Proceedings, 2010In the design of horizontal axis wind turbines (HAWT) one problem is to determine the aeroelastic behaviour of the rotor blades for the various wind inflow conditions. A step in this process is to predict with accuracy the aerodynamic loads on the blades.
R. Bogateanu +5 more
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Implementation of a Free-Vortex Wake Model in Real-Time Simulation of Rotorcraft
Journal of Aerospace Computing, Information, and Communication, 2006Free-vortex wake models are capable of providing an accurate and physically detailed representation of the main rotor wake for flight dynamics simulation. Recent advances in computing power and efficient algorithms have made it feasible to use free wakes for real-time simulation.
Joseph F. Horn +3 more
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