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Calculations of Multibladed Rotors in Hover using 3D Euler Methods of DLR and ONERA

Raddatz, J. and Rouzaui, O. (1995) Calculations of Multibladed Rotors in Hover using 3D Euler Methods of DLR and ONERA. 21st European Rotorcraft Forum, Saint Petersburg, Russia, August 30 - September 1, 1995.

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Abstract

Two different Euler codes for hovering rotor calculations, developed by DLR and ONERA, are compared and assessed using common computational grids. The test cases are based on the Caradonna- Tung data base and on the new HELISHAPE tests with 4-bladed 7A rotor,scheduled for end of 1995. For all test cases the predicted pressure distributions of both codesare in good agreement. Considering that Euler calculation do not account for viscous effects the predicted surface data also compare well with experiments. A detailed comparison of the wake and tip vortex representation by both Euler methods shows some differences. The strong effects of numerical diffusion on wake resolution are demontrated. It is found that a detailed wake and vortex representation hinders the con- vergence to steady state of the Euler methods, particularly the integrated flow quantities oscillate with iteration.

Document Type:Conference or Workshop Item (Paper)
Additional Information: institution=Russian Helicopter Society, LIDO-Berichtsjahr=1995, pages=18,
Title:Calculations of Multibladed Rotors in Hover using 3D Euler Methods of DLR and ONERA
Authors:
AuthorsInstitution or Email of Authors
Raddatz, J.UNSPECIFIED
Rouzaui, O.UNSPECIFIED
Date:1995
Status:Published
Keywords:Rotorstroemungen, Schwebeflug, Euler-Gleichungen, HELISHAPE, Blattnachlauf, Blattspitzenwirbel, Netzverfeinerung, Dissipation,
Event Title:21st European Rotorcraft Forum, Saint Petersburg, Russia, August 30 - September 1, 1995
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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