Results 41 to 50 of about 39,286,164 (327)
Journal of Physics: Conference Series, 2015 This paper presents a simple physical model to improve the currently used far-wake deficit models in the wind industry. The main improvement is deemed on the determination of the wake deficit in the near-wake. A Vortex Ring Model (VRM) is used to calculate the induced velocities in the near-wake, which are then coupled to the Jensen far-wake model and ...
Van Heemst, J.W. (author) +3 more
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Multiple Wind Turbine Wakes Modeling Considering the Faster Wake Recovery in Overlapped Wakes [PDF]
Energies, 2019 In a wind farm some wind turbines may be affected by multiple upwind wakes. The commonly used approach in engineering to simulate the interaction effect of different wakes is to combine the single analytical wake model and the interaction model. The higher turbulence level and shear stress profile generated by upwind turbines in the superposed area ...
Shao, Zhenzhou +4 more
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Momentum-Conserving Wake Superposition for Deep Wakes in the Dynamic Wake Meandering Model [PDF]
Journal of Physics: Conference SeriesAbstract Accurate wake superposition is essential for time-domain wind-farm models operating in deep-wake conditions, such as aligned turbine rows. Conventional linear and root-sum-square superposition methods often fail to predict realistic power recovery and wake deficits in such configurations.
Steiner, Julia +3 more
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The galactic wake model of the Magellanic Stream [PDF]
Symposium - International Astronomical Union, 1979 Tidal interaction models for the origin of the Magellanic Stream have been fairly successful in reproducing the radial velocities of the Stream (Lin and Lynden-Bell 1977, Davies and Wright 1977). However, no investigator has yet attained a self consistent treatment in which (1) the LMC and SMC are bound for at least 5×109 yr, (2) the passing Magellanic
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A diffusion-based wind turbine wake model
Journal of Fluid MechanicsDescribing the evolution of a wind turbine's wake from a top-hat profile near the turbine to a Gaussian profile in the far wake is a central feature of many engineering wake models.
Karim Ali, T. Stallard, P. Ouro
semanticscholar +1 more source
Wind Energy Science, 2020 . Wind turbine wake models typically require approximations, such as wake superposition and deflection models, to accurately describe wake physics. However, capturing the phenomena of interest, such as the curled wake and interaction of multiple wakes ...
L. Martínez‐Tossas +7 more
semanticscholar +1 more source
A mathematical model for a wake.
Michigan Mathematical Journal, 1984 A free boundary problem for a wake around an obstacle in a two dimensional incompressible, inviscid fluid flow has been considered. Sufficient conditions for the existence of wakes in doubly and simply connected starlike regions have been formulated.
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The vortex wake of a ‘hovering’ model hawkmoth
Philosophical Transactions of the Royal Society of London. Series B: Biological Sciences, 1997 Visualization experiments with Manduca sexta have revealed the presence of a leading–edge vortex and a highly three–dimensional flow pattern. To further investigate this important discovery, a scaled–up robotic insect was built (the ‘flapper’) which could mimic the complex movements of the ...
van den Berg, C., Ellington, C.P.
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Towards a Simplified DynamicWake Model Using POD Analysis
Energies, 2015 We apply a modified proper orthogonal decomposition (POD) to large eddy simulation data of a wind turbine wake in a turbulent atmospheric boundary layer. The turbine is modeled as an actuator disk.
David Bastine +3 more
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A New Streamwise Scaling for Wind Turbine Wake Modeling in the Atmospheric Boundary Layer
Energies, 2022 In this study, we aim to investigate if there is a scaling of the streamwise distance from a wind turbine that leads to a collapse of the mean wake velocity deficit under different ambient turbulence levels.
Dara Vahidi, Fernando Porté-Agel
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