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The Effect of Shock Control Bumps on the Transonic Flutter and Buffeting Characteristics of a Typical Wing Section

Nitzsche, Jens and Otte, Jonathan and Kaiser, Christoph and Hennings, Holger (2022) The Effect of Shock Control Bumps on the Transonic Flutter and Buffeting Characteristics of a Typical Wing Section. In: 19th International Forum on Aeroelasticity and Structural Dynamics, IFASD 2022. International Forum on Aeroelasticity and Structural Dynamics (IFASD) 2022, 13.-17. Juni 2022, Madrid, Spanien. ISBN 978-840942353-8.

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Abstract

We investigate the effects of small-scale airfoil geometry modifications, in particular so-called shock control bumps (SCB), on the transonic flutter and buffeting behavior of a classical two-degree-of-freedom model employing linearized stability analysis. The unsteady aerodynamic forces are modelled by solving the discretized RANS equations with respect to small-perturbation mesh deformation input. Special emphasis is put on the coupling of fluid modes and structural modes. SCBs that are designed initially towards purely aerodynamic buffet suppression perform also well in the aeroelastic analysis with respect to fluid-mode flutter. Classical flutter and buffeting are found to be separated by an apparent wall of stability. It is further noted that SCBs can potentially serve to improve the classical flutter behavior in the transonic dip region.

Item URL in elib:https://elib.dlr.de/188433/
Document Type:Conference or Workshop Item (Speech)
Title:The Effect of Shock Control Bumps on the Transonic Flutter and Buffeting Characteristics of a Typical Wing Section
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Nitzsche, JensUNSPECIFIEDhttps://orcid.org/0000-0002-2742-7368UNSPECIFIED
Otte, JonathanUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kaiser, ChristophUNSPECIFIEDhttps://orcid.org/0000-0001-9156-8352133665733
Hennings, HolgerUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Date:June 2022
Journal or Publication Title:19th International Forum on Aeroelasticity and Structural Dynamics, IFASD 2022
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
ISBN:978-840942353-8
Status:Published
Keywords:unsteady aerodynamics, transonic dip, transonic buffet, fluid-mode flutter, flow separation, shock control bump
Event Title:International Forum on Aeroelasticity and Structural Dynamics (IFASD) 2022
Event Location:Madrid, Spanien
Event Type:international Conference
Event Dates:13.-17. Juni 2022
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Efficient Vehicle
DLR - Research area:Aeronautics
DLR - Program:L EV - Efficient Vehicle
DLR - Research theme (Project):L - Aircraft Technologies and Integration, L - Virtual Aircraft and  Validation
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity > Aeroelastic Simulation
Deposited By: Nitzsche, Jens
Deposited On:23 Sep 2022 17:54
Last Modified:18 Aug 2023 11:31

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