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Comparison of Euler and Full Potential Methods for Unsteady Transonic Flow Calculations.

Voß, R. and Wegner, W. (1992) Comparison of Euler and Full Potential Methods for Unsteady Transonic Flow Calculations. In: AGARD Conference Proceedings 507, Transonic Unsteady Aerodynamics and Aeroelasticity, March 1992.. Papers presented at the 73rd Meeting of the AGARD Structures and Materials Panel, San Diegeo, CA. USA, 7th-11th October 1991..

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Abstract

This paper presents the results of unsteady transonic flow calculation methods developed at the DLR Institute of Aeroelasticity for oscillating airfoils and wings. 2D Euler and Full Potential calculations in the nonlinear regime with pronouned shock dynamics atthe conventional NACA0012 and the supercritical NLR7301 airfoil show that the unsteady pressure distributions agree well, whereas the unsteady lift and moment curves are not always in good agreement.3D results are obtained with a 3D Full Potential code and a 3D time linearized TSD method for a swept NACA0012 wing and for the LANN wing, an AGARD standard test wing, both oscillating with small amplitudes. The agreement of the unsteady first harmonics of pressuredistribution indicates that the time linearized approach may be sufficient for low amplitudes. For higher amplitudes, however, the appearance of pronouned higher harmonics (even for a wing with a conventional airfoil section) indicates strong nonlinear behavior combined with complicated shock motions.

Item URL in elib:https://elib.dlr.de/39556/
Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=1992,
Title:Comparison of Euler and Full Potential Methods for Unsteady Transonic Flow Calculations.
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Voß, R.UNSPECIFIEDUNSPECIFIED
Wegner, W.UNSPECIFIEDUNSPECIFIED
Date:1992
Journal or Publication Title:AGARD Conference Proceedings 507, Transonic Unsteady Aerodynamics and Aeroelasticity, March 1992.
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Series Name:AGARD-CP-507
Status:Published
Keywords:Unsteady transonic flow, CFD Methods, Upwind Methods, Potential Theory, Euler Methods.
Event Title:Papers presented at the 73rd Meeting of the AGARD Structures and Materials Panel, San Diegeo, CA. USA, 7th-11th October 1991.
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L ST - Starrflüglertechnologien
DLR - Research theme (Project):UNSPECIFIED
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity
Deposited By: DLR-Beauftragter, elib
Deposited On:02 Apr 2006
Last Modified:27 Apr 2009 10:47

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