Stability of blasius boundary-layer flow interacting with a compliant panel
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We develop a model to study the fluid-structure interaction (FSI) of a compliant panel with a Blasius boundary-layer flow. We carry out a two-dimensional global linear stability analysis modeling the flow using a combination of vortex and source boundary-element sheets on a computational grid while the dynamics of a plate-spring compliant wall are represented in finite-difference form. The system is then couched as an eigenvalue problem and the eigenvalues of the various flow-and wall-based instabilities are analyzed for two distinct sets of system parameters. Key findings are that coalescence - or resonance - of a structural eigenmode with either the most unstable flow-based Tollmien-Schlichting Wave (TSW) or wall-based travelling-wave flutter (TWF) modes can occur. This renders the convective nature of these instabilities to become global for a finite compliant wall, a phenomenon that has not hitherto been reported in the literature.
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Modelling and analysis of the global stability of Blasius boundary-layer flow interacting with a compliant wallTsigklifis, Konstantinos; Lucey, Tony (2013)Theoretical and experimental studies have shown that compliant walls are able to reduce the growth rates of unstable Tollmien-Schlichting waves (TSWs) that are the conventional route to boundary layer transition in ...
Tsigklifis, Konstantinos; Lucey, Anthony (2017)The time-asymptotic linear stability of pulsatile flow in a channel with compliant walls is studied together with the evaluation of modal transient growth within the pulsation period of the basic flow as well as non-modal ...
Tsigklifis, Konstantinos; Lucey, Anthony (2015)We develop a hybrid of computational and theoretical approaches suited to study the fluid–structure interaction (FSI) of a compliant panel, flush between rigid upstream and downstream wall sections, with a Blasius ...