Numerical experiment of compressible flow in convergent channel- pressure spectral analysis

0375116 - ÚT 2013 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
Pořízková, P. - Kozel, Karel - Horáček, Jaromír
Numerical experiment of compressible flow in convergent channel- pressure spectral analysis.
Conference Topical problem of Fluid Mechanics 2012. Praha: Ústav termomechaniky AV ČR, v. v. i, 2012 - (Šimurda, D.; Kozel, K.), s. 67-70. ISBN 978-80-87012-40-6.
[Topical Problems of Fluid Mechanics 2012. Praha (CZ), 15.02.2012-17.02.2012]
Grant CEP: GA ČR(CZ) GAP101/11/0207
Výzkumný záměr: CEZ:AV0Z20760514
Klíčová slova: finite volume method * voice production modeling * Navier-Stokes equations
Kód oboru RIV: BI - Akustika a kmity

This study deals with a numerical solution of a 2D unsteady flow of a compressible viscous fluid in a channel for low inlet airflow velocity. The unsteadiness of the flow is caused by a prescribed periodic motion of a part of the channel wall with large amplitudes, nearly closing the channel during oscillations. The flow is described by the system of Navier-Stokes equations for laminar flows. The numerical solution is implemented using the finite volume method (FVM) and the predictor-corrector MacCormack scheme with Jameson artificial viscosity using a gird of quadrilateral cells. The numerical results of unsteady flows in the channel are presented for inlet velocity uĄ = 4.12m/s, inlet Reynolds number ReĄ = 4481 and wall motion frequency 100Hz.
Trvalý link: http://hdl.handle.net/11104/0207859