Author(s)

U. Iben

Abstract

Numerical simulation of high-pressure hydraulic systems with weak pipe strain U. Iben Robert Bosch GmbH, Dept. FV/FLM, Stuttgart, Germany Abstract In the development phase of modern hydraulic tools the use of simulation of the complete system is of growing importance. The physical modelling of complex hydraulic flow in weak elastic systems and numerical solution of the appropriate conservation equations present a major challenge. The numerical solver has to cope shocks, phase transition, and the pipe strain provoced by pressure waves. The paper presents the modelling equations and system simulations with parameter variations for a hydraulic system consisting of a reservoir, a pipe, and a nozzle. 1 Introduction High pressure hydraulic systems are employed in different industrial applications such as in aircraft for controlling the landing gear or vertical and horizontal stabilizer, in breaking systems for vehicles, and in injection systems for Diesel and gasoline engines. The pressure level in

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