Zobrazeno 1 - 10 of 108 pro vyhledávání: '"Frederik Zahle"'
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Akademický článek
Post-Optimum Sensitivity Analysis with Automatically Tuned Numerical Gradients Applied to Swept Wind Turbine Blades
Autor: Michael K. McWilliam, Antariksh C. Dicholkar, Frederik Zahle, Taeseong Kim
Publikováno v: Energies, Vol 15, Iss 9, p 2998 (2022)
Post-Optimum Sensitivity Analysis (POSA) extends numerical design optimization to provide additional information on how the design and performance would change if various parameters and constraints were varied. POSA is challenging since it typically
Externí odkaz: https://doaj.org/article/2573374da5024566b5b92428aa552140
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4
Immersed boundary method for the incompressible Reynolds Averaged Navier–Stokes equations
Autor: Niels Troldborg, Niels N. Sørensen, Frederik Zahle
Publikováno v: Troldborg, N, Sørensen, N N & Zahle, F 2022, ' Immersed boundary method for the incompressible Reynolds Averaged Navier–Stokes equations ', Computers and Fluids, vol. 237, 105340 . https://doi.org/10.1016/j.compfluid.2022.105340
This paper presents an immersed boundary method for the incompressible Reynolds Averaged Navier–Stokes equations using the k−ω−SST turbulence model and two different wall functions to approximate the near wall flow. The main focus of the paper
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e495aa241b57759edce4d23cd92c46a7
https://orbit.dtu.dk/en/publications/6858be7c-7d51-4e12-ba3e-c15887db9870
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5
CFD-based curved tip shape design for wind turbine blades
Autor: Athanasios Barlas, Mads Holst Aagaard Madsen, Niels N. Sørensen, Sergio Gonzalez Horcas, Frederik Zahle
Publikováno v: Madsen, M H A, Zahle, F, Horcas, S G, Barlas, T K & Sørensen, N N 2022, ' CFD-based curved tip shape design for wind turbine blades ', Wind Energy Science, vol. 7, no. 4, pp. 1471-1501 . https://doi.org/10.5194/wes-7-1471-2022
This work presents a high-fidelity shape optimization framework based on computational fluid dynamics (CFD). The presented work is the first comprehensive curved tip shape study of a wind turbine rotor to date using a direct CFD-based approach. Prece
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1c03c985c37850dcb3cc79e219bbe02b
https://wes.copernicus.org/preprints/wes-2021-115/
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6
Influence of the installation of a trailing edge flap on the vortex induced vibrations of a wind turbine blade
Autor: Athanasios Barlas, Mads Holst Aagaard Madsen, Niels N. Sørensen, Sergio Gonzalez Horcas, Frederik Zahle
Publikováno v: Horcas, S G, Madsen, M H A, Sørensen, N N, Zahle, F & Barlas, T 2022, ' Influence of the installation of a trailing edge flap on the vortex induced vibrations of a wind turbine blade ', Journal of Wind Engineering and Industrial Aerodynamics, vol. 229, 105118 . https://doi.org/10.1016/j.jweia.2022.105118
This work explores the use of a trailing edge flap for the mitigation of the Vortex Induced Vibrations (VIV) of a wind turbine blade in standstill. Fluid structure interaction simulations are performed, coupling a computational fluid dynamics code wi
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5b52f89865e08f0e89421b14c62a6218
https://doi.org/10.1016/j.jweia.2022.105118
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7
Wind turbines in atmospheric flow: fluid–structure interaction simulations with hybrid turbulence modeling
Autor: Niels N. Sørensen, Sergio González Horcas, Frederik Zahle, Christian Grinderslev, Niels Troldborg
Publikováno v: Grinderslev, C, Sørensen, N N, Horcas, S G, Troldborg, N & Zahle, F 2021, ' Wind turbines in atmospheric flow: Fluid-structure interaction simulations with hybrid turbulence modeling ', Wind Energy Science, vol. 6, no. 3, pp. 627-643 . https://doi.org/10.5194/wes-6-627-2021
Wind Energy Science, Vol 6, Pp 627-643 (2021)
In order to design future large wind turbines, knowledge is needed about the impact of aero-elasticity on the rotor loads and performance and about the physics of the atmospheric flow surrounding the turbines. The objective of the present work is to
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::03038ff3087edad50af202c3a4010832
https://wes.copernicus.org/articles/6/627/2021/
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8
Redesign of an upwind rotor for a downwind configuration: design changes and cost evaluation
Autor: Gesine Wanke, David Robert Verelst, Frederik Zahle, Leonardo Bergami
Publikováno v: Wind Energy Science, Vol 6, Pp 203-220 (2021)
Wanke, G, Bergami, L, Zahle, F & Verelst, D R 2021, ' Redesign of an upwind rotor for a downwind configuration: Design changes and cost evaluation ', Wind Energy Science, vol. 6, no. 1, pp. 203-220 . https://doi.org/10.5194/wes-6-203-2021
Within this work, an existing model of a Suzlon S111 2.1 MW turbine is used to estimate potential cost savings when the conventional upwind rotor concept is changed into a downwind rotor concept. A design framework is used to get realistic design upd
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::81a1be4f2e1a174d645fd6b8676b0d04
https://wes.copernicus.org/articles/6/203/2021/
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9
Wind turbines in atmospheric flow – FSI simulations with hybrid LES-IDDES turbulence modelling
Autor: Christian Grinderslev, Niels Nørmark Sørensen, Sergio González Horcas, Niels Troldborg, Frederik Zahle
In order to design future large wind turbines, knowledge is needed about the impact of aero-elasticity on the rotor loads and performance, and about the physics of the atmospheric flow surrounding the turbines. The objective of the present work is to
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1f55a10a2691c731875b53f58796ea7b
https://wes.copernicus.org/preprints/wes-2020-122/
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10
Comparison of aerodynamic planform optimization of non-planar rotors using blade element momentum method and a vortex cylinder model
Autor: Mac Gaunaa, Kenneth Loenbaek, Georg Pirrung, Ang Li, Frederik Zahle
Publikováno v: Journal of Physics: Conference Series. 2265:032055
The present work compares non-planar rotors designed using the blade element momentum (BEM) method and a vortex cylinder model. In a previous work, it is shown that blade element theory coupled with the superposition of the vortex cylinder model (BEV
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::810c1d922385d063e089a95e03ea9d52
https://doi.org/10.1088/1742-6596/2265/3/032055
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