Effective Roughness and Displaced Mean Flow over Complex Terrain

Autor: Dalibor Cavar, Mark C. Kelly

Publikováno v: Kelly, M & Cavar, D 2023, ' Effective Roughness and Displaced Mean Flow over Complex Terrain ', Boundary-Layer Meteorology, vol. 186, pp. 93-123 . https://doi.org/10.1007/s10546-022-00748-z

Via analysis of velocity and stress fields from Reynolds-Averaged Navier–Stokes simulations over diverse complex terrains spanning several continents, in neutral conditions we find displaced areal-mean logarithmic wind speed profiles. The correspon

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f904be1802ccd7c6f46a2e90b5e3a955
https://doi.org/10.1007/s10546-022-00748-z

Numerical modelling of the wind over forests: roughness versus canopy drag

Autor: Tobias Klaas, Andrey Sogachev, Mark C. Kelly, Ebba Dellwik, Paul Kühn, Dalibor Cavar

Publikováno v: Advances in Science and Research, Vol 17, Pp 53-61 (2020)

Parameterizing the effect of vertically-distributed vegetation through an effective roughness (z0,eff) – whereby momentum loss through a three-dimensional foliage volume is represented as momentum loss over an area at one vertical level – can fac

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4988f263791ab19b429cf078f9cd2937
https://doi.org/10.5194/asr-17-53-2020

Extreme wind fluctuations: joint statistics, extreme turbulence, and impact on wind turbine loads

Autor: Ásta Hannesdóttir, Mark C. Kelly, Nikolay Krasimirov Dimitrov

Publikováno v: Wind Energy Science, Vol 4, Pp 325-342 (2019)
Hannesdóttir, Á, Kelly, M C & Dimitrov, N K 2019, ' Extreme wind fluctuations: Joint statistics, extreme turbulence, and impact on wind turbine loads ', Wind Energy Science, vol. 4, no. 2, pp. 325-342 . https://doi.org/10.5194/wes-4-325-2019

For measurements taken over a decade at the coastal Danish site Høvsøre, we find the variance associated with wind speed events from the offshore direction to exceed the prescribed extreme turbulence model (ETM) of the International Electrotechnica

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a18d88e50b2d3cb691fcca487ba98632
https://www.wind-energ-sci.net/4/325/2019/wes-4-325-2019.pdf

Statistical impact of wind-speed ramp events on turbines, via observations and coupled fluid-dynamic and aeroelastic simulations

Autor: Ásta Hannesdóttir, Mark C. Kelly, Søren Juhl Andersen

Publikováno v: Wind Energy Science, Vol 6, Pp 1227-1245 (2021)
Kelly, M, Andersen, S J & Hannesdóttir, Á 2021, ' Statistical impact of wind-speed ramp events on turbines, via observations and coupled fluid-dynamic and aeroelastic simulations ', Wind Energy Science, vol. 6, no. 5, pp. 1227-1245 . https://doi.org/10.5194/wes-6-1227-2021

Via 11 years of high-frequency measurements, we calculated the probability space of expected offshore wind-speed ramps, recasting it compactly in terms of relevant load-driving quantities for horizontal-axis wind turbines. A statistical ensemble of e

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::54aa15145478d3dde9453adc2b1e94a5
https://wes.copernicus.org/preprints/wes-2021-40/

Boundary-Layer Transition Model for Icing Simulations of Rotating Wind Turbine Blades

Autor: Chankyu Son, Mark C. Kelly, Taeseong Kim

Publikováno v: Son, C, Kelly, M & Kim, T 2021, ' Boundary-Layer Transition Model for Icing Simulations of Rotating Wind Turbine Blades ', Renewable Energy, vol. 167, pp. 172-183 . https://doi.org/10.1016/j.renene.2020.11.070
Renewable Energy

Icing simulations for wind turbine blades should consider the roughness-induced flow transition. Adding a transport equation for ‘roughness amplification’ to the Langtry-Menter model, the roughness-induced transition can be predicted for rough fl

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9f99d886248b6e7e17d25da9d98375ad
https://orbit.dtu.dk/en/publications/dd8fbc73-7eb6-4f34-a10f-455848b1d6f5