Results 71 to 80 of about 10,195 (155)

On the wake of a Darrieus turbine [PDF]

, 1981
The theory and experimental measurements on the aerodynamic decay of a wake from high performance vertical axis wind turbine are discussed. In the initial experimental study, the wake downstream of a model Darrieus rotor, 28 cm diameter and a height of ...
Base, T. E., Nowak, E. S., Phillips, P., Robertson, G.   +3 more
core   +1 more source

Monopile-induced turbulence and sediment redistribution form visible wakes in offshore wind farms

Frontiers in Earth Science
Offshore wind farms are becoming an increasingly common feature in the marine environment as a renewable energy source. There is a growing body of evidence on the effects of wind farms on the seabed and its organisms.
Lewis P. Bailey, Lewis P. Bailey, Robert M. Dorrell, Ina Kostakis, David McKee, David McKee, Dan Parsons, Dan Parsons, Jon Rees, James Strong, James Strong, Stephen Simmons, Rodney Forster   +12 more
doaj   +1 more source

Flow visualization using momentum and energy transport tubes and applications to turbulent flow in wind farms

, 2012
As a generalization of the mass-flux based classical stream-tube, the concept of momentum and energy transport tubes is discussed as a flow visualization tool.
Meneveau, Charles, Meyers, Johan
core   +1 more source

umerical simulation of atmospheric boundary layer and wakes of horizontal-axis wind turbines

Journal of Energy in Southern Africa, 2017
Simulations of wind turbine wakes are presented in this paper using the three-dimensional Reynolds-Averaged Navier-Stokes (RANS) equations employing the k-e turbulence model appropriately modified for the atmospheric flows.
Ali M. AbdelSalam, Ramalingam Velraj
doaj   +1 more source

Prediction of low frequency and impulsive sound radiation from horizontal axis wind turbines [PDF]

, 1981
Theoretical models to predict the radiation of low frequency and impulsive sound from horizontal axis wind turbines due to three sources: (1) steady blade loads; (2) unsteady blade loads due to operation in a ground shear; (3) unsteady loads felt by the ...
Harris, W. L., Martinez, R., Widnall, S. E.   +2 more
core   +1 more source

Assessment of Wind over Complex Terrain Considering the Effects of Topography, Atmospheric Stability and Turbine Wakes

Atmosphere
This study proposes a microscale flow model to estimate mean wind speed, fluctuating wind speed and wind direction over complex terrain considering the effects of topography, atmospheric stability, and turbine wakes.
Atsushi Yamaguchi, Alireza Tavana, Takeshi Ishihara   +2 more
doaj   +1 more source

Analysis of turbulence and vortex structures by flow mapping [PDF]

, 1997
The technique of Particle Image Velocimetry (PIV) flow mapping is reviewed and comparisons made with Laser Doppler Anemometry (LDA). Results are presented showing the application of PlV to the determination of coherent structures in grid-generated ...
Damm, C.E., Greated, C.A., Whale, J.
core   +1 more source

Wind Turbine Wake Characterization with Nacelle-Mounted Wind Lidars for Analytical Wake Model Validation

Remote Sensing, 2018
This study presents the setup, methodology and results from a measurement campaign dedicated to the characterization of full-scale wind turbine wakes under different inflow conditions.
Fernando Carbajo Fuertes, Corey D. Markfort, Fernando Porté-Agel   +2 more
doaj   +1 more source

Load Estimation of Offshore Wind Turbines

Energies, 2018
The influence of 3 MW Hywind-II wind turbine wakes from an upstream offshore floating wind turbine on a downstream turbine with a separation distance of seven rotor diameters was studied for a site in the Gulf of Maine.
Sang Lee, Matthew Churchfield, Frederick Driscoll, Senu Sirnivas, Jason Jonkman, Patrick Moriarty, Bjόrn Skaare, Finn Gunnar Nielsen, Erik Byklum   +8 more
doaj   +1 more source

Comparison of 2nd generation LiDAR wind measurement technique with CFD numerical modelling [PDF]

, 2012
With the rapid increase in both on and offshore wind turbine deployment there is a requirement for a better understanding of the flow field in which such devices are deployed.
Butler, Jonathan, Quail, Francis
core