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3D Euler Calculations of Multibladed Rotors in Hover: Investigation of the Wake Capturing Properties

Raddatz, J. (1994) 3D Euler Calculations of Multibladed Rotors in Hover: Investigation of the Wake Capturing Properties. 75th AGARD Fluid Dynamics Panel Symposium on "Aerodynamics and Aeroac coustics of Rotorcraft".

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Abstract

The 3D flowfield of a hovering rotor is calculated solving the Euler equations. Performing a grid refinement study it is demonstrated that an Euler method is able to capture the wake and vortices of a hovering rotor without any wake modelling. Accurate prediction of these rotational flow field phenomena needs fine grids with a high resolution in the complete region of the wake system. Additionally, high accuracy for the treatment of all numerical boundaries, which affect the vortex wake, is required. On the other hand, the investigations have shown that airloads are less effected by a more detailed resolution of the wake system. A second part of the study is concerned with wake capturing properties on block boundaries, especially on inner boundaries of overlapping grids. Overlapping grids are very attractive for the computation of a rotor in lifting forward flight or a rotor-body flowfield in hover.

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=1994, pages=16,
Title:3D Euler Calculations of Multibladed Rotors in Hover: Investigation of the Wake Capturing Properties
Authors:
AuthorsInstitution or Email of Authors
Raddatz, J.UNSPECIFIED
Date:1994
Status:Published
Keywords:Rotorstroemungen, Schwebeflug, Euler-Gleichungen, Blattnachlauf, Blattspitzenwirbel, Netzverfeinerung, Randbedingungen, ueberlappende Netze
Event Title:75th AGARD Fluid Dynamics Panel Symposium on "Aerodynamics and Aeroac coustics of Rotorcraft"
HGF - Research field:UNSPECIFIED
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:UNSPECIFIED
DLR - Program:L DT - Drehflüglertechnologien
DLR - Research theme (Project):L - The Quiet and Comfortable Rotorcraft
Location: Köln-Porz , Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Institut für Entwurfsaerodynamik
Deposited By: elib DLR-Beauftragter
Deposited On:03 Apr 2006
Last Modified:27 Apr 2009 10:05

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