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Euler Calculations of Multibladed Rotors in Hover by DLR and ONERA Methods and Comparison with HELISHAPE Tests

Rouzaud, O. and Raddatz, J. and Boniface, J.C. (1998) Euler Calculations of Multibladed Rotors in Hover by DLR and ONERA Methods and Comparison with HELISHAPE Tests. AHS Journal, Vol. 43 (No. 4), pp. 296-302.

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Abstract

Within the European Project HELISHAPE, the Euler methods of multibladed rotors in hoverflight, developed respectively by DLR and ONERA, have been compared and assessed. No wake model is used by both methods. The computations are performed as blind-test calculations on common single-block structured grids. The test cases arae the HELISHAPE hover experiments with the 4-bladed 7A rotor and 7A-D1 rotor. These rotors are scaled versions of realistic helicopter rotors with an aspect ratio of 15. For all test cases the predicted pressure distributions of both codes are 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 demonstrated.

Document Type:Article
Additional Information: LIDO-Berichtsjahr=1999,
Title:Euler Calculations of Multibladed Rotors in Hover by DLR and ONERA Methods and Comparison with HELISHAPE Tests
Authors:
AuthorsInstitution or Email of Authors
Rouzaud, O.UNSPECIFIED
Raddatz, J.UNSPECIFIED
Boniface, J.C.UNSPECIFIED
Date:1998
Journal or Publication Title:AHS Journal
Refereed publication:Yes
In ISI Web of Science:Yes
Volume:Vol. 43
Page Range:pp. 296-302
Status:Published
Keywords:Rotorströmungen, Schwebeflug, Euler-Gleichungen, HELISHAPE, Blattnachlauf, Blattspitzenwirbel
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Aeronautics
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: Claudia Grant
Deposited On:16 Sep 2005
Last Modified:14 Jan 2010 20:03

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