Search Results - "Churchfield, Matthew J"

A large-eddy simulation study of wake propagation and power production in an array of tidal-current turbines by Churchfield, Matthew J., Li, Ye, Moriarty, Patrick J.

“…This paper presents our initial work in performing large-eddy simulations of tidal turbine array flows. First, a horizontally periodic precursor simulation is…”
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Floating platform effects on power generation in spar and semisubmersible wind turbines by Johlas, Hannah M., Martínez‐Tossas, Luis A., Churchfield, Matthew J., Lackner, Matthew A., Schmidt, David P.

“…The design and financing of commercial‐scale floating offshore wind projects require a better understanding of how power generation differs between newer…”
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Generalized filtered lifting line theory for arbitrary chord lengths and application to wind turbine blades by Martínez‐Tossas, Luis A., Sakievich, Philip, Churchfield, Matthew J., Meneveau, Charles

“…The filtered lifting line theory is an analytical approach used to solve the equations of flow subjected to body forces with a Gaussian distribution, such as…”
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Wind Turbine Wake Characterization from Temporally Disjunct 3-D Measurements by Doubrawa, Paula, Barthelmie, Rebecca J, Wang, Hui, Pryor, S C, Churchfield, Matthew J

“…Scanning LiDARs can be used to obtain three-dimensional wind measurements in and beyond the atmospheric surface layer. In this work, metrics characterizing…”
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Toward Development of a Stochastic Wake Model: Validation Using LES and Turbine Loads by Moon, Jae, Manuel, Lance, Churchfield, Matthew, Lee, Sang, Veers, Paul

“…Wind turbines within an array do not experience free-stream undisturbed flow fields. Rather, the flow fields on internal turbines are influenced by wakes…”
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Load response of a floating wind turbine to turbulent atmospheric flow by Doubrawa, Paula, Churchfield, Matthew J., Godvik, Marte, Sirnivas, Senu

“…•Coherent turbulent structures affect floater loading mainly in high-wind conditions.•Failing to model lateral coherence can lead to an overestimation of…”
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Meteorology for Coastal/Offshore Wind Energy in the United States: Recommendations and Research Needs for the Next 10 Years by Archer, Cristina L., Colle, Brian A., Monache, Luca Delle, Dvorak, Michael J., Lundquist, Julie, Bailey, Bruce H., Beaucage, Philippe, Churchfield, Matthew J., Fitch, Anna C., Kosovic, Branko, Lee, Sang, Moriarty, Patrick J., Simao, Hugo, Stevens, Richard J. A. M., Veron, Dana, Zack, John

“…[...]because of the high CPU-hours required, LES can be conducted for only a few hours or at equilibrium-state using periodic boundary conditions. Because LES…”
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Adding complex terrain and stable atmospheric condition capability to the OpenFOAM-based flow solver of the simulator for on/offshore wind farm applications (SOWFA) by Churchfield, Matthew J., Lee, Sang, Moriarty, Patrick J.

“…The National Renewable Energy Laboratory's Simulator for On/Offshore Wind Farm Applications contains an OpenFOAM-based flow solver for performing large-eddy…”
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The aerodynamics of the curled wake: a simplified model in view of flow control by Martínez-Tossas, Luis A, Annoni, Jennifer, Fleming, Paul A, Churchfield, Matthew J

“…When a wind turbine is yawed, the shape of the wake changes and a curled wake profile is generated. The curled wake has drawn a lot of interest because of its…”
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Do wind turbines pose roll hazards to light aircraft? by Tomaszewski, Jessica M, Lundquist, Julie K, Churchfield, Matthew J, Moriarty, Patrick J

“…Wind energy accounted for 5.6 % of all electricity generation in the United States in 2016. Much of this development has occurred in rural locations, where…”
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Large-eddy simulation sensitivities to variations of configuration and forcing parameters in canonical boundary-layer flows for wind energy applications by Mirocha, Jeffrey D, Churchfield, Matthew J, Muñoz-Esparza, Domingo, Rai, Raj K, Feng, Yan, Kosović, Branko, Haupt, Sue Ellen, Brown, Barbara, Ennis, Brandon L, Draxl, Caroline, Javier Sanz Rodrigo, Shaw, William J, Berg, Larry K, Moriarty, Patrick J, Linn, Rodman R, Kotamarthi, Veerabhadra R, Balakrishnan, Ramesh, Cline, Joel W, Robinson, Michael C, Ananthan, Shreyas

“…The sensitivities of idealized large-eddy simulations (LESs) to variations of model configuration and forcing parameters on quantities of interest to wind…”
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A numerical study of the effects of atmospheric and wake turbulence on wind turbine dynamics by Churchfield, Matthew J., Lee, Sang, Michalakes, John, Moriarty, Patrick J.

“…Although the atmospheric sciences community has been studying the effects of atmospheric stability and surface roughness on the planetary boundary layer for…”
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Generalized filtered lifting line theory for arbitrary chord lengths and application to wind turbine blades by Martínez‐Tossas, Luis A., Sakievich, Philip, Churchfield, Matthew J., Meneveau, Charles

“…Abstract The filtered lifting line theory is an analytical approach used to solve the equations of flow subjected to body forces with a Gaussian distribution,…”
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ON BRIDGING A MODELING SCALE GAP: Mesoscale to Microscale Coupling for Wind Energy by Haupt, Sue Ellen, Kosovic, Branko, Shaw, William, Berg, Larry K., Churchfield, Matthew, Cline, Joel, Draxl, Caroline, Ennis, Brandon, Koo, Eunmo, Kotamarthi, Rao, Mazzaro, Laura, Mirocha, Jeffrey, Moriarty, Patrick, Muñoz-Esparza, Domingo, Quon, Eliot, Rai, Raj K., Robinson, Michael, Sever, Gokhan

“…Accurately representing flow across the mesoscale to the microscale is a persistent roadblock for completing realistic microscale simulations. The science…”
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A large-eddy simulation study of wake propagation and power production in an array of tidal-current turbines by Churchfield, Matthew J., Li, Ye, Moriarty, Patrick J.

“…This paper presents our initial work in performing large-eddy simulations of tidal turbine array flows. First, a horizontally periodic precursor simulation is…”
Get full text

Load Estimation of Offshore Wind Turbines by Lee, Sang, Churchfield, Matthew, Driscoll, Frederick, Sirnivas, Senu, Jonkman, Jason, Moriarty, Patrick, Skaare, Bjόrn, Nielsen, Finn, Byklum, Erik

“…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…”
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On Bridging A Modeling Scale Gap: Mesoscale to Microscale Coupling for Wind Energy by Haupt, Sue Ellen, Kosovic, Branko, Shaw, William, Berg, Larry K., Churchfield, Matthew J., Cline, Joel, Draxl, Caroline, Ennis, Brandon, Koo, Eunmo, Kotamarthi, Rao, Mazzaro, Laura J., Mirocha, Jeffrey D., Moriarty, Patrick, Muñoz-Esparza, Domingo, Quon, Eliot, Rai, Raj K., Robinson, Michael, Sever, Gokhan

“…Accurately representing flow across the mesoscale to the microscale is a persistent roadblock for completing realistic microscale simulations. The science…”
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Analysis of the sweeped actuator line method by Nathan, Jörn, Masson, Christian, Dufresne, Louis, Churchfield, Matthew

“…The actuator line method made it possible to describe the near wake of a wind turbine more accurately than with the actuator disk method. Whereas the actuator…”
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Meteorology for coastal/offshore wind energy in the United States: recommendations and research needs for the next 10 years by Archer, Cristina L, Colle, Brian A, Monache, Luca Delle, Dvorak, Michael J, Lundquist, Julie, Bailey, Bruce H, Beaucage, Philippe, Churchfield, Matthew J, Fitch, Anna C, Kosovic, Branko, Lee, Sang, Moriarty, Patrick J, Simao, Hugo, Stevens, Richard J.A.M, Veron, Dana, Zack, John

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SAUPPLEMENT: METEOROLOGY FOR COASTAL/OFFSHORE WIND ENERGY IN THE UNITED STATES Recommendations and Research Needs for the Next 10 Years by Archer, Cristina L., Colle, Brian A., Monache, Luca Delle, Dvorak, Michael J., Lundquist, Julie, Bailey, Bruce H., Beaucage, Philippe, Churchfield, Matthew J., Fitch, Anna C., Kosovic, Branko, Lee, Sang, Moriarty, Patrick J., Simao, Hugo, Stevens, Richard J. A. M., Veron, Dana, Zack, John

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