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Numerical Investigation of the Flutter Behaviour of a Laminar Supercritical Airfoil

van Rooij, A.C.L.M. and Wegner, Wolfgang (2012) Numerical Investigation of the Flutter Behaviour of a Laminar Supercritical Airfoil. 18. DGLR-Fach-Symposium der STAB, 06. Nov. - 07. Nov. 2012, Stuttgart, Deutschland.

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Nowadays drag reductions are important also in aircraft design. Natural laminar flow on aircraft wings is therefore preferred over chaotic turbulent flow. So-called laminar airfoils can be used to achieve (partly) laminar flow. Laminar flow should however not lead to a reduction in the capabilities of an aircraft. Since the flutter boundary is one of the most important boundaries of the flight envelop of an aircraft it is important to investigate the effect of laminar flow on this boundary. Since this has not been investigated yet, a first step was taken in this work by the use of numerical simulations. CFD simulations with and without boundary layer transition were performed to obtain the generalised airloads. Using a two-degrees-of-freedom structural model the flutter boundary was computed. The minimum of this boundary, the so-called transonic dip, was found to be lower in case of free boundary layer transition compared to the fully turbulent case. Hence, the flutter behaviour of a laminar supercritical airfoil seems to be more critical in (partly) laminar flow at transonic conditions than in case of fully turbulent flow.

Item URL in elib:https://elib.dlr.de/82297/
Document Type:Conference or Workshop Item (Speech)
Title:Numerical Investigation of the Flutter Behaviour of a Laminar Supercritical Airfoil
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
van Rooij, A.C.L.M.UNSPECIFIEDhttps://orcid.org/0000-0001-8281-7441UNSPECIFIED
Date:6 November 2012
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Boundary layer transition, Flutter, Laminar Airfoil, Transonic Flow, Unsteady Flow
Event Title:18. DGLR-Fach-Symposium der STAB
Event Location:Stuttgart, Deutschland
Event Type:national Conference
Event Dates:06. Nov. - 07. Nov. 2012
Organizer:Deutsche Stroemungsmechanische Arbeitsgemeinschaft, STAB
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research (old)
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation & Validation (old)
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity > Aeroelastic Simulations
Deposited By: van Rooij, Anouk
Deposited On:16 May 2013 10:10
Last Modified:29 Mar 2023 00:17

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