Simulation Of Wave Propagation In Flexible Hoses
Author(s)
R. Etlender, U. Iben & M. Bischoff
Abstract
A fluid-structure interaction model is presented for transient flow in flexible hoses.
The wall shear stress is included. The governing equations for the fluid flow are
discretized by a finite-volume method. The wall is considered as a thin structure
consisting of shells and is discretized by a finite element method. The coupling of
the solvers is applied iteratively-staged.
Keywords: quasi one-dimensional conservation laws, wave propagation, fluid
structure interaction, Godunov method, cavitation.
1 Introduction
The development of complex hydraulic systems, such as fuel injection systems,
requires efficient simulation models to analyze system properties. Wave
propagations in flexible hoses have a significant influence on both the transient
mass flow rate over specific parts and the overall system behavior. Due to the
restriction of computational time, quasi one-dimensional models have to be used
for system simulations.
In industrial applications flexible hoses are not only used due to their low cost
but also to damp pressure oscillations. To simulate the overall system behavior,
the common frequency analysis based on linear transfer matrices can not be used.
This is due to the following facts: firstly, the occurring pressure waves have high
amplitudes, therefore linear transfer properties are not valid anymore. Secondly,
the simulation tools applied in the development process use time based algorithms
instead of frequency domain. Thus to simulate the fluid structure interaction in the
hoses, algorithms using a compressible flow solver and a solver for the structure
of the flexible pipes have to be developed.
Keywords
quasi one-dimensional conservation laws, wave propagation, fluidstructure interaction, Godunov method, cavitation.
Related Book
Other papers in this volume
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