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Global linear stability analysis of flow in a lined duct

Pascal, Lucas and Piot, Estelle and Casalis, Grégoire Global linear stability analysis of flow in a lined duct. (2017) Journal of Sound and Vibration, 140. 19-34. ISSN 0022-460X

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Official URL: https://doi.org/10.1016/j.jsv.2017.08.007


Eigenmodes of the linearised Euler equations are computed in order to study lined flow duct global stability. A simplified configuration is considered and the governing equations are discretised by means of the discontinuous Galerkin method. A biorthogonal technique is used to decompose the global eigenfunctions into local eigenmodes. The system dynamics switches from noise amplifier to resonator as the length of the liner is increased. The global mode in the liner region is shown to be mainly composed of a hydrodynamic unstable wave and a left-running acoustic mode.

Item Type:Article
HAL Id:hal-01697793
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
French research institutions > Office National d'Etudes et Recherches Aérospatiales - ONERA (FRANCE)
Deposited On:31 Jan 2018 10:52

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