Article in Edited Volumes


Fluid-Structure-Acoustic Interaction of a Thin, Flexible Plate in the Wake of a Wall Mounted Square Cylinder


Publication Details
Author(s): Uffinger T, Schäfer F, Becker S, Grabinger J, Kaltenbacher M
Editor(s): Meister A, Hartmann S, Schäfer M, Turek S
Title edited volumes: International Workshop on Fluid-Structure Interaction - Theory, Numerics and Applications
Publisher: Kassel University Press
Publication year: 2009
Pages range: 253-264
ISBN: 978-3-89958-666-4
Language: English

Abstract

A coupled simulation approach for fluid-structure-acoustic interactions is presented, which considers both the flow-induced sound and the sound due to structural vibrations. The proposed computation scheme is based on a partitioned approach that uses different simulation codes for the flow simulation and the structural and acoustic computations. The flow simulation is done by an in-house finite-volume code solving the incompressible Navier- Stokes equations in space and time. For the structural mechanics computations, an in-house finite-element multi- physics code is applied, which is also able to solve the acoustic wave equation describing the wave propagation to the far field. An implicit coupling scheme with sub-iterations in each time step is employed for fluid-structure interaction. The computation of the aeroacoustic sound is based on Lighthill’s theory. The structural-acoustic coupling is realized by applying appropriate boundary conditions to the acoustic wave equation. The above-described methodology is applied to a simplified model of a car underbody. The acoustic field due to the interaction of a thin, flexible plate representing coverings of the car underbody and a turbulent flow is investigated. The flexible plate is part of an otherwise rigid wall that is overflown by air. To model obstacles typically found at real car underbodies, a square cylinder is placed upstream of the flexible plate. The Reynolds number of the flow based on the free stream veloctiy and the obstacle height is 26 000.



How to cite
APA: Uffinger, T., Schäfer, F., Becker, S., Grabinger, J., & Kaltenbacher, M. (2009). Fluid-Structure-Acoustic Interaction of a Thin, Flexible Plate in the Wake of a Wall Mounted Square Cylinder. In Meister A, Hartmann S, Schäfer M, Turek S (Eds.), International Workshop on Fluid-Structure Interaction - Theory, Numerics and Applications (pp. 253-264). Kassel University Press.

MLA: Uffinger, Thomas, et al. "Fluid-Structure-Acoustic Interaction of a Thin, Flexible Plate in the Wake of a Wall Mounted Square Cylinder." International Workshop on Fluid-Structure Interaction - Theory, Numerics and Applications Ed. Meister A, Hartmann S, Schäfer M, Turek S, Kassel University Press, 2009. 253-264.

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