Zobrazeno 1 - 10
of 66
pro vyhledávání: '"Nikolas Angelou"'
Publikováno v:
Remote Sensing, Vol 14, Iss 23, p 6065 (2022)
Estimates of atmospheric turbulence performed by both fixed and floating vertically profiling, conically scanning wind lidars are affected by the measurement volume and turbulence structure, among others. We study this phenomenon by simulating the li
Externí odkaz:
https://doaj.org/article/df877964aec04226bb8d84818e5cc22d
Autor:
Nikolas Angelou, Mikael Sjöholm
Publikováno v:
Remote Sensing, Vol 14, Iss 13, p 3225 (2022)
Wind lidars can be used on wind turbines to monitor the inflow for power curve verification and for control purposes. In these applications, the lidar is most often placed on the nacelle behind the rotating blades, which occasionally intercept the li
Externí odkaz:
https://doaj.org/article/d481084d762648c894b0e1707b441d18
We investigate the characteristics of the inflow and the wake of a 6MW floating wind turbine from the Hywind Scotland offshore wind farm, the world's first floating wind farm. We use two commercial nacelle-mounted lidars to measure the up- and downwi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::482c90237026cb638df6b417ec05af5d
https://wes.copernicus.org/preprints/wes-2023-37/
https://wes.copernicus.org/preprints/wes-2023-37/
In moderate to heavy precipitation, rain droplets may deteriorate Doppler lidars' accuracy for measuring the line-of-sight wind velocity because their projected velocity on the beam direction differs greatly from that of air. Therefore, we propose a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d8948c710a5d64ee8b2b0f65ca6c084a
https://doi.org/10.5194/egusphere-2023-464
https://doi.org/10.5194/egusphere-2023-464
Publikováno v:
Angelou, N, Mann, J & Dellwik, E 2022, ' Wind lidars reveal turbulence transport mechanism in the wake of a tree ', Atmospheric Chemistry and Physics, vol. 22, no. 4, pp. 2255-2268 . https://doi.org/10.5194/acp-22-2255-2022
Atmospheric Chemistry and Physics, Vol 22, Pp 2255-2268 (2022)
Atmospheric Chemistry and Physics, Vol 22, Pp 2255-2268 (2022)
Solitary trees are natural land surface elements found in almost all climates, yet their influence on the surrounding airflow is poorly known. Here we use state-of-the-art, laser-based, remote sensing instruments to study the turbulent wind field in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f88c84821d231a45906e0d6c05a25b84
https://orbit.dtu.dk/en/publications/e02f2088-8afd-4a8d-9dcf-2655e34c2a7d
https://orbit.dtu.dk/en/publications/e02f2088-8afd-4a8d-9dcf-2655e34c2a7d
Publikováno v:
Bekkers, C C A, Angelou, N & Dellwik, E 2022, ' Drag coefficient and frontal area of a solitary mature tree ', Journal of Wind Engineering and Industrial Aerodynamics, vol. 220, 104854 . https://doi.org/10.1016/j.jweia.2021.104854
Trees are important natural wind engineering elements in both the urban and the agricultural contexts, but their aerodynamic description has been limited by its focus on young, flexible trees. Here, we provide a reformulation of the classical drag eq
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bcbb932e05414296009a9b5244621cfc
https://orbit.dtu.dk/en/publications/07a2745c-bc4d-4e99-9d71-56f40fb710a2
https://orbit.dtu.dk/en/publications/07a2745c-bc4d-4e99-9d71-56f40fb710a2
The objective of this work is to enhance the understanding of the mean wind and turbulence characteristics in the wake of a full-scale wind turbine. Here, we present observations of the three-dimensional wind vector in the near wake of a wind turbine
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::647de821c07b833c404733fef506b076
https://doi.org/10.5194/ems2021-137
https://doi.org/10.5194/ems2021-137
Publikováno v:
Forestry: An International Journal of Forest Research. 92:381-392
In this study, we investigate the relationship between the mean wind-induced load on an open-grown oak tree and the mean wind speed. The estimation of the wind load is based on bending moment observations on the stem, using strain gauges installed cl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9bb35a40a9f4c5cf8d57df28f281eef9
https://doi.org/10.1093/forestry/cpz026
https://doi.org/10.1093/forestry/cpz026