Zobrazeno 1 - 10
of 88
pro vyhledávání: '"Stefan Ivanell"'
Autor:
Christoffer Hallgren, Johan Arnqvist, Stefan Ivanell, Heiner Körnich, Ville Vakkari, Erik Sahlée
Publikováno v:
Energies, Vol 13, Iss 14, p 3670 (2020)
With an increasing interest in offshore wind energy, focus has been directed towards large semi-enclosed basins such as the Baltic Sea as potential sites to set up wind turbines. The meteorology of this inland sea in particular is strongly affected b
Externí odkaz:
https://doaj.org/article/565a1fe4126547c293a6c110fdffa8aa
Publikováno v:
Applied Sciences, Vol 9, Iss 5, p 922 (2019)
The impact of the Coriolis force on the long distance wake behind wind farms is investigated using Large Eddy Simulations (LES) combined with a Forced Boundary Layer (FBL) technique. When using the FBL technique any mean wind shear and turbulent fluc
Externí odkaz:
https://doaj.org/article/57f44967f1ba492bb1bca0e925dbece1
Publikováno v:
Applied Sciences, Vol 9, Iss 3, p 431 (2019)
The aim of the present study is to perform a comparative analysis of two actuator disc methods (ACD) and two analytical wake models for wind farm power production assessment. To do so, wind turbine power production data from the Lillgrund offshore wi
Externí odkaz:
https://doaj.org/article/e9e2f5e7cae74d70bffe64216fd7d4ea
Assessment of Turbulence Modelling in the Wake of an Actuator Disk with a Decaying Turbulence Inflow
Autor:
Hugo Olivares-Espinosa, Simon-Philippe Breton, Karl Nilsson, Christian Masson, Louis Dufresne, Stefan Ivanell
Publikováno v:
Applied Sciences, Vol 8, Iss 9, p 1530 (2018)
The characteristics of the turbulence field in the wake produced by a wind turbine model are studied. To this aim, a methodology is developed and applied to replicate wake measurements obtained in a decaying homogeneous turbulence inflow produced by
Externí odkaz:
https://doaj.org/article/c858f49f849648debfe5e7b9cba30f0e
This paper investigates different actuator sector model implementation alternatives and how they compare to actuator line results. The velocity sampling method, tip correction, and time step are considered. A good agreement is seen between the line a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::360808a9466946c92c58d1b958ecbbe4
https://doi.org/10.5194/wes-2023-16
https://doi.org/10.5194/wes-2023-16
Publikováno v:
Weather and Forecasting.
One of the most prominent mesoscale phenomenon in the coastal zone is the sea breeze/land breeze circulation. The pattern and its implications for the weather in coastal areas is well described and with mesoscale resolving operational NWP models the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5db6edaa103912f9e69ae27cf1737f8a
https://doi.org/10.1175/waf-d-22-0163.1
https://doi.org/10.1175/waf-d-22-0163.1
Autor:
Gonzalo Pablo Navarro Diaz, Alejandro Daniel Otero, Henrik Asmuth, Jens Nørkær Sørensen, Stefan Ivanell
Publikováno v:
Navarro Diaz, G P, Otero, A D, Asmuth, H, Sørensen, J N & Ivanell, S 2023, ' Actuator line model using simplified force calculation methods ', Wind Energy Science, vol. 8, no. 3, pp. 363-382 . https://doi.org/10.5194/wes-8-363-2023
To simulate transient wind turbine wake interaction problems using limited wind turbine data, two new variants of the actuator line technique are proposed in which the rotor blade forces are computed locally using generic load data. The proposed mode
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::66864825bed93504ee6ac01fc3eb1e93
https://wes.copernicus.org/articles/8/363/2023/
https://wes.copernicus.org/articles/8/363/2023/
Autor:
Henrik Asmuth, Gonzalo P. Navarro Diaz, Helge Aagaard Madsen, Emmanuel Branlard, Alexander R. Meyer Forsting, Karl Nilsson, Jason Jonkman, Stefan Ivanell
Publikováno v:
Asmuth, H, Navarro Diaz, G P, Madsen, H A, Branlard, E, Meyer Forsting, A R, Nilsson, K, Jonkman, J & Ivanell, S 2022, ' Wind turbine response in waked inflow: A modelling benchmark against full-scale measurements ', Renewable Energy, vol. 191, pp. 868-887 . https://doi.org/10.1016/j.renene.2022.04.047
Predicting the power and loads of wind turbines in waked inflow conditions still presents a major modelling challenge. It requires the accurate modelling of the atmospheric flow conditions, wakes of upstream turbines and the response of the turbine o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::95672e344d796943da46ba4ee12e6b8f
https://doi.org/10.1016/j.renene.2022.04.047
https://doi.org/10.1016/j.renene.2022.04.047
Accurately forecasting short-term wind power production is a challenging task. As the share of wind power in the electrical system is rapidly growing, this task is becoming increasingly important not only for power production companies but also for t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bb1a91e9f8961e54b0fcb74a7c281616
https://doi.org/10.5194/egusphere-egu22-13481
https://doi.org/10.5194/egusphere-egu22-13481
Publikováno v:
Wind Energy. 23:1482-1493
The technique of using imposed turbulence in combination with a forced boundary layer in order to model the atmospheric boundary layer is analyzed for a very long domain using large-eddy simulations with different combinations of prescribed velocity
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::260bcda80c43060aaaf9d959a25eae8d
https://doi.org/10.1002/we.2498
https://doi.org/10.1002/we.2498