Institution
Vestas
Company•Aarhus, Denmark•
About: Vestas is a company organization based out in Aarhus, Denmark. It is known for research contribution in the topics: Turbine & Wind power. The organization has 1075 authors who have published 1519 publications receiving 23285 citations. The organization is also known as: Vestas Wind Systems & Vestas Wind Systems A/S.
Topics: Turbine, Wind power, Turbine blade, Rotor (electric), Power optimizer
Papers published on a yearly basis
Papers
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TL;DR: In this article, the authors proposed a tower construction for a wind mill and a method of laying a foundation of a tower. But their tower construction is not suitable for wind mill construction.
Abstract: The invention provides a tower construction e.g. for a wind mill and a method of laying a foundation of a tower construction. The tower construction (1) comprises a concrete element (2), and a base flange (3) from which a tower wall (4) extends upwardly. The base flange is supported by an intermediate support structure (5) positioned on the concrete element (2). The support structure (5) is more rigid than the concrete element (2) and comprises a resilient pressure distributing element (6) which is soft relative to the concrete element (2). Furthermore, the invention provides a support structure for a tower construction.
88 citations
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13 Sep 2007TL;DR: In this paper, a wind turbine blade is constructed with a truss support structure assembly of composite truss joints including composite spar and cross members attached to and supporting in spaced relation a spine of lightweight rib panels.
Abstract: A lightweight wind turbine blade formed with a truss support structure assembly of composite truss joints including composite spar and cross members attached to and supporting in spaced relation a spine of lightweight rib panels. The rib panels are oriented in parallel spaced relation from one another and individually molded with perimeters defining individual areas of curvature for the finished blade assembly. The truss support structure is covered with a lightweight fiberglass or hardened fabric skin attached to and fitted on respective rib panel edges forming an airfoil structure.
88 citations
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02 Jan 2020
TL;DR: In this paper, a grid-based aerodynamic element momentum (BEM) model for wind turbines is presented. But the authors focus on the upscaling of wind turbines from rotor diameters of 15-20'm to presently large rotors of 150-200'm.
Abstract: . We show that the upscaling of wind turbines from rotor diameters of 15–20 m to presently large rotors of 150–200 m has changed the requirements for the aerodynamic blade element momentum (BEM) models in the aeroelastic codes. This is because the typical scales in the inflow turbulence are now comparable with the rotor diameter of the large turbines. Therefore, the spectrum of the incoming turbulence relative to the rotating blade has increased energy content on 1P , 2P , …, nP , and the annular mean induction approach in a classical BEM implementation might no longer be a good approximation for large rotors. We present a complete BEM implementation on a polar grid that models the induction response to the considerable 1P , 2P , …, nP inflow variations, including models for yawed inflow, dynamic inflow and radial induction. At each time step, in an aeroelastic simulation, the induction derived from a local BEM approach is updated at all the stationary grid points covering the swept area so the model can be characterized as an engineering actuator disk (AD) solution. The induction at each grid point varies slowly in time due to the dynamic inflow filter but the rotating blade now samples the induction field; as a result, the induction seen from the blade is highly unsteady and has a spectrum with distinct 1P , 2P , …, nP peaks. The load impact mechanism from this unsteady induction is analyzed and it is found that the load impact strongly depends on the turbine design and operating conditions. For operation at low to medium thrust coefficients (conventional turbines at above rated wind speed or low induction turbines in the whole operating range), it is found that the grid BEM gives typically 8 %–10 % lower 1 Hz blade root flapwise fatigue loads than the classical annular mean BEM approach. At high thrust coefficients that can occur at low wind speeds, the grid BEM can give slightly increased fatigue loads. In the paper, the implementation of the grid-based BEM is described in detail, and finally several validation cases are presented. Comparisons with blade loads from full rotor CFD, wind tunnel experiments and a field experiment show that the model can predict the aerodynamic forces in half-wake, yawed flow, dynamic inflow and turbulent inflow conditions.
87 citations
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06 Jan 2003TL;DR: In this paper, a floating foundation for wind turbines is proposed, where the foundation essentially comprises at least three submerged buoyancy bodies connected to the lower end of the tower of the wind turbine at a common node member situated well above the surface of the sea.
Abstract: A floating foundation for wind turbines is disclosed, where the foundation essentially comprises at least three submerged buoyancy bodies connected to the lower end of the tower of the wind turbine at a common node member situated well above the surface of the sea. The buoyancy bodies are connected to the node member by means of relatively thin leg sections, whereby wave load on the foundation is reduced. By applying the foundation according to the present invention, stress concentrations and torques in the node member are reduced, whereby it becomes possible to apply a relatively lightweight and hence cheap node member. The overall weight of the construction is thereby reduced and hence the volume of the buoyancy bodies necessary to counteract the overall weight of the construction.
86 citations
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28 Feb 2003TL;DR: In this article, a method of manufacturing a wind turbine blade is described, which comprises the steps of: casting at least two wind turbine shells and preferably one or more load bearing structures, forming a wind-turbine blade structure including at least 2 longitudinal joints by adhering the two wind turbines shells together, forming front covers to a shape substantially corresponding to the wind turbine blades, positioning the front covers in relation to the turbine blade structure, and fastening them to the blade structure with adhoc means.
Abstract: The invention relates to a method of manufacturing a wind turbine blade, said method comprising the steps of: casting at least two wind turbine shells and preferably one or more load bearing structures, forming a wind turbine blade structure including at least two longitudinal joints by adhering said at least two wind turbine shells and said one or more load bearing structures together, forming one or more front covers to a shape substantially corresponding to said wind turbine blade structure or sections hereof, positioning said one or more front covers in relation to said wind turbine blade structure, and fastening said one or more front covers to said wind turbine blade structure with adhering means. The invention also relates to a wind turbine blade, front cover and the use of a front cover as a unit for supplementary mounting on a wind turbine blade.
85 citations
Authors
Showing all 1077 results
Name | H-index | Papers | Citations |
---|---|---|---|
Remus Teodorescu | 84 | 606 | 38521 |
Pedro Rodriguez | 67 | 496 | 24551 |
Saurabh Gupta | 38 | 545 | 5907 |
Florin Iov | 32 | 166 | 4225 |
Cher Ming Tan | 31 | 285 | 3666 |
Philip Carne Kjaer | 26 | 97 | 2315 |
Martin G. Evans | 25 | 55 | 4712 |
Peter Fogh Odgaard | 23 | 95 | 2515 |
Lars Helle | 23 | 72 | 2881 |
Torben Knudsen | 23 | 116 | 2157 |
Jan-Willem van Wingerden | 21 | 151 | 2554 |
Daniel E. Viassolo | 21 | 68 | 1125 |
Lars Finn Sloth Larsen | 20 | 73 | 1260 |
Anton Bech | 19 | 69 | 1128 |
Mark Hancock | 16 | 44 | 994 |