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On Modal Methods for the Study of Transonic Buffet on Wings

AMS Seminar Series

Speaker: Sebastian Timme, University of Liverpool

Presentation

Seminar Slide Deck (PDF-4.8MB)

Abstract

In recent years, there has been extensive research in (and suggestions about the capability of) modal analysis of fluid flow, making use of unsteady experimental and simulated datasets or discretised operators of the underlying partial differential equations describing the relevant dynamics of the physical problem. This has included transonic aerodynamics with unsteady shock-wave/boundary-layer interaction, specifically shock buffet, featuring self-sustained recurring large-scale flow separation and reattachment with implications on wing design and aircraft certification. It has yet to be determined whether these modal approaches are feasible and useful for an aircraft design and development programme. The talk is concerned with operator-based (global stability and resolvent) methods in the study of such edge-of-the-envelope wing aerodynamics.

Biography

Photo of Sebastian Timme
Sebastian Timme is a Reader in Computational Aerodynamics at the University of Liverpool (United Kingdom), after completing his PhD in 2010, with secondments to DLR Göttingen (Germany) in 2010 and BAE Systems Filton (United Kingdom) in 2016-17. He has published approximately 80 journal and conference papers about computational aerodynamics and aeroelasticity, model order reduction and machine learning. His main interest is in fast simulation tools for routine industrial application of computational fluid dynamics (CFD) in the multidisciplinary aircraft loads and aeroelastics context, focussing on implicit methods, numerical linear algebra and frequency-domain approaches.