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Comparison of different approaches for modeling atmospheric effects like gusuts and wake-vortices in the CFD code TAU

Heinrich, Ralf and Reimer, Lars (2017) Comparison of different approaches for modeling atmospheric effects like gusuts and wake-vortices in the CFD code TAU. In: 17th INTERNATIONAL FORUM ON AEROELASTICITY AND STRUCTURAL DYNAMICS (Forum Proceedings), pp. 1-13. IFASD 2017 - 17th international forum on aeroelasticity and structural dynamics, 25.-28. Juni 2017, Como, Italien. ISBN 978 88 97576 28 0

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Official URL: http://www.ifasd2017.com

Abstract

Two different methods for modeling of atmospheric effects have been implemented into the CFD code TAU. The first one is the so called disturbance velocity approach, a simplified method which allows predicting the influence of gusts or wake vortices on the aircraft, but not vice versa. Alternatively, an unsteady boundary condition has been implemented to feed in the atmospheric disturbances into the flow field. Thereby the mutual interaction of atmospheric disturbances and aircraft is captured. Both methods are compared for 3D applications in order to access the validity range of the simplified approach. A result is that the simplified approach is sufficient accurate for scenarios relevant for the certification process of aircraft. Even for a gust wavelength down to one reference chord length the agreement of the highly accurate method and simplified approach is fair. To demonstrate the capability of the simplified method for industrial applications, the maneuver of a generic fighter configuration through the wake vortices of an aircraft in front is simulated. The reaction of the aircraft due to the additional loads has been taken into account by coupling of CFD with flight mechanics.

Item URL in elib:https://elib.dlr.de/116752/
Document Type:Conference or Workshop Item (Speech)
Title:Comparison of different approaches for modeling atmospheric effects like gusuts and wake-vortices in the CFD code TAU
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Heinrich, RalfRalf.Heinrich (at) dlr.deUNSPECIFIED
Reimer, LarsLars.Reimer (at) dlr.deUNSPECIFIED
Date:June 2017
Journal or Publication Title:17th INTERNATIONAL FORUM ON AEROELASTICITY AND STRUCTURAL DYNAMICS (Forum Proceedings)
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 1-13
ISBN:978 88 97576 28 0
Status:Published
Keywords:Gust encounter, wake vortex encounter, disturbance velocity approach, resolved atmosphere approach, unsteady simulation
Event Title:IFASD 2017 - 17th international forum on aeroelasticity and structural dynamics
Event Location:Como, Italien
Event Type:international Conference
Event Dates:25.-28. Juni 2017
Organizer:Politechnico Milano, Department of Aerospace Science and Technology
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - VicToria
Location: Braunschweig
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > CASE, BS
Deposited By: Heinrich, Dr.-Ing. Ralf
Deposited On:05 Feb 2018 14:17
Last Modified:22 Feb 2018 15:06

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