ISBN 9783843950619

978-3-8439-5061-9, Reihe Ingenieurwissenschaften

Elena Kolb
Aeroacoustic Simulation of Turbulent Fluid-Structure Interactions at Low Mach Numbers

130 Seiten, Dissertation Technische Universität Darmstadt (2022), Softcover, A5

Zusammenfassung / Abstract

Aeroacoustic effects from fluid-structure interactions arise in a large number of engineering and biofluid mechanics applications. The complexity of the underlying physical mechanisms, especially in low Mach number turbulent problems, calls for reliable simulation methods that contribute to a better understanding of sound generation and ultimately support the design process of technical applications.

This thesis presents the development, implementation and analysis of a multi-physics simulation approach that combines the disciplines of computational fluid dynamics, computational aeroacoustics and computational solid mechanics. For this purpose, well-established solvers and discretisation methods tailored to the specific requirements of each subproblem are coupled in a partitioned simulation scheme. The aeroacoustic simulation is based on a hydrodynamic-acoustic splitting technique that accounts for the scale disparity between the incompressible flow and acoustic field. The two computational fields are solved with the finite volume method. Large-eddy simulation is applied to resolve the relevant turbulent flow structures. The third computational field of solid mechanics is solved with the finite element method.