Výsledky vyhledávání - "Ewald Krämer"

Akademický článek

Assessment of low‐frequency aeroacoustic emissions of a wind turbine under rapidly changing wind conditions based on an aero‐servo‐elastic CFD simulation

Autor: Florian Wenz, Oliver Maas, Matthias Arnold, Thorsten Lutz, Ewald Krämer

Publikováno v: Wind Energy, Vol 26, Iss 8, Pp 745-762 (2023)

Abstract A meteorologically challenging situation that represents a demanding control task (rotational speed, pitch and yaw) for a wind turbine is presented and its implementation in a simulation is described. A high‐fidelity numerical process chai

Externí odkaz: https://doaj.org/article/0d4fc607d40240daafe327eaff48416d

Zobrazit plný text záznamu

Experimental and Numerical Investigation of Stall on the NACA 64(3) – 418 Airfoil

Autor: Maximilian Ehrle, Jonas Romblad, Andreas Waldmann, Pascal Weihing, Thorsten Lutz, Ewald Krämer

Publikováno v: AIAA Journal. 60:6594-6608

In this paper, measurements of the stall of a NACA [Formula: see text] airfoil section are presented and compared to a simulation with a hybrid Reynolds-averaged Navier–Stokes (RANS)/large-eddy simulation (LES) model with the goal of gaining deeper

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2b4d7e00cc95402e9c997afb0d7f0301
https://doi.org/10.2514/1.j061922

Zobrazit plný text záznamu

Aerodynamic Interactions on Airbus Helicopters' Compound Helicopter RACER in Hover

Autor: Jakob Thiemeier, Manuel Keβler, Constantin Öhrle, Felix Frey, Ewald Krämer

Publikováno v: Journal of the American Helicopter Society. 67:1-17

In recent years, helicopter manufacturers have developed an increasing number of nonconventional configurations in order to extend flight envelopes of helicopters towards higher cruise speed. Airbus Helicopters' approach is the compound helicopter RA

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ae5e7bd58b62f848e029dbfb5aa13d08
https://doi.org/10.4050/jahs.67.012007

Zobrazit plný text záznamu

Numerical Study of the Unsteady Blade Root Aerodynamics of a 2MW Wind Turbine Equipped With Vortex Generators

Autor: Ferdinand Seel, Thorsten Lutz, Ewald Krämer

In order to design vortex generators for modern multi-megawatt wind turbines accurately, the three-dimensional behaviour of the boundary layer has to be considered. Due to the rotation of the blade, the lift-enhancing rotational augmentation has a co

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e67642eb71777d1e4646b03c8b6a6348
https://wes.copernicus.org/preprints/wes-2023-27/

Zobrazit plný text záznamu

Author response for 'Assessment of low‐frequency aeroacoustic emissions of a wind turbine under rapidly changing wind conditions based on an aero‐servo‐elastic CFD simulation'

Autor: null Florian Wenz, null Oliver Maas, null Matthias Arnold, null Thorsten Lutz, null Ewald Krämer

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f4d6eb8304976732c09436760860a301
https://doi.org/10.1002/we.2826/v2/response1

Zobrazit plný text záznamu

Experimental and Numerical Investigation of a Full-Sized Aerodynamic Vehicle Model in Relation to Its Production Car

Autor: Ewald Krämer, Philipp Renz

Publikováno v: SAE International Journal of Advances and Current Practices in Mobility. 4:236-248

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::be1ec94e203f87bb3aff9735da03601a
https://doi.org/10.4271/2021-01-0963

Zobrazit plný text záznamu

Aerodynamic and aeroacoustic performance investigations on modified H-rotor Darrieus wind turbine

Autor: Amgad Dessoky, Ewald Krämer, Thorsten Lutz

Publikováno v: Wind Engineering. 46:69-88

The present paper investigates the aerodynamic and aeroacoustic characteristics of the H-rotor Darrieus vertical axis wind turbine (VAWT) combined with very promising energy conversion and steering technology; a fixed guide-vanes. The main scope of t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d35bdadc0400e7950e154c7e8def3685
https://doi.org/10.1177/0309524x211003963

Zobrazit plný text záznamu

Aeroelastic analysis of wind turbines under turbulent inflow conditions

Autor: Giorgia Guma, Ewald Krämer, Thorsten Lutz, Galih Bangga

Publikováno v: Wind Energy Science, Vol 6, Pp 93-110 (2021)

The aeroelastic response of a 2 MW NM80 turbine with a rotor diameter of 80 m and interaction phenomena are investigated by the use of a high-fidelity model. A time-accurate unsteady fluid–structure interaction (FSI) coupling is used between a comp

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6c545d2a5ff84e1a4c80805b58d7a51e
https://doi.org/10.5194/wes-6-93-2021

Zobrazit plný text záznamu

Aerodynamic and structural analysis of a partial turboelectric commuter aircraft with wingtip propellers at aircraft level

Autor: Clemens Zumegen, Philipp Strathoff, Eike Stumpf, Michael Schollenberger, Thorsten Lutz, Ewald Krämer, Bastian Kirsch, Jens Friedrichs, Martin Schubert, Athanasios Dafnis, Kai-Uwe Schröder

Publikováno v: AIAA AVIATION 2022 Forum.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b45fda5518ad6f9a9c549e423d3b1de2
https://doi.org/10.2514/6.2022-3955

Zobrazit plný text záznamu

Aerodynamic Interactions on Airbus Helicopters' Compound Helicopter RACER in Cruise Flight

Autor: Ewald Krämer, Felix Frey, Manuel Keßler, Constantin Öhrle, Jakob Thiemeier

Publikováno v: Scopus-Elsevier

With the pursuit of extending the flight envelopes of helicopters toward higher cruise speed, helicopter manufacturers increasingly have come up with nonconventional configurations in recent years. Among these, Airbus Helicopters' RACER (Rapid And Co

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8e263265dafbc994a20f3f345b0d56dd
https://doi.org/10.4050/jahs.65.042001

Zobrazit plný text záznamu

Vyhledávací nástroje:

Upřesnit hledání