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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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Abstract
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/ | |||||||||
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| Document Type: | Conference or Workshop Item (Speech) | |||||||||
| Title: | Numerical Investigation of the Flutter Behaviour of a Laminar Supercritical Airfoil | |||||||||
| Authors: |
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| Date: | 6 November 2012 | |||||||||
| Refereed publication: | No | |||||||||
| Open Access: | No | |||||||||
| Gold Open Access: | No | |||||||||
| In SCOPUS: | No | |||||||||
| In ISI Web of Science: | No | |||||||||
| Status: | Accepted | |||||||||
| 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: | 01 Dec 2018 19:49 |
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