An alternative method to calculate cross-flow instabilities
| Autor: | Meng-Meng Wu, Soledad Le Clainche Martínez, Zhong-Hua Han, Esteban Ferrer |
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| Rok vydání: | 2018 |
| Předmět: |
Airfoil
Physics business.industry 020209 energy Física 02 engineering and technology Mechanics Computational fluid dynamics Secondary flow 01 natural sciences Instability Aeronáutica 010305 fluids & plasmas Physics::Fluid Dynamics Transition point Flow (mathematics) 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Dynamic mode decomposition business Reynolds-averaged Navier–Stokes equations |
| Zdroj: | Fluid Dynamics Conference 2018 : held at the AIAA Aviation Forum 2018 | AIAA AVIATION Forum, 2018 Fluid Dynamics Conference | 25-28 Jun 2018 | Atlanta, Georgia, EE.UU. Archivo Digital UPM Universidad Politécnica de Madrid |
| DOI: | 10.2514/6.2018-3700 |
| Popis: | This work presents a new method to compute instabilities associated to cross-flow transition scenarios. The method analyses base flows issued from CFD simulations (RANS model) using higher order dynamic mode decomposition (HODMD). The flow field is then approximated as an expansion of modes and it is possible to identify the primary and secondary flow instabilities, in cross-flows. The good performance of this novel method is first validated by locating the transition point related to the first instability in a low-speed 2D NLF0416 airfoil. Then, 3D cross-flow instabilities over a wing with 40◦ back-sweep angle (shaped from a NACA642A015 airfoil) are presented. |
| Databáze: | OpenAIRE |
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