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Simulation of fluid transients, for nonlinear fluids, with a lumped parameter model
Author(s) -
Haas Rainer,
Manhartsgruber Bernhard
Publication year - 2009
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.200910225
Subject(s) - inertia , compressibility , nonlinear system , cascade , mechanics , transient (computer programming) , suction , control theory (sociology) , engineering , physics , mechanical engineering , computer science , classical mechanics , quantum mechanics , chemical engineering , operating system , control (management) , artificial intelligence
This paper deals with the modeling of transients in low pressure transmission lines. Modeling of low pressure lines becomes more and more important for increasing efficiency of fast switching applications and performance of pumps e.g. common rail diesel injection systems and suction pipes of pumps. One simulation method is the lumped parameter model. For example a straight pipe can be modeled as a cascade of inertia, friction and compressibility blocks. In this paper, the idea of cascades is adopted for transient simulation of nonlinear fluids. The model includes a nonlinear fluid law of an oil‐air mixture and the balance equations i.e. the compressibility and the inertia of the fluid. Friction is modeled by the frequency dependent friction model of Kagawa et.al. Comparison of simulation results with measurements from a test rig shows good correlation. Finally the scope of this simulation model is discussed and compared with measurements. (© 2009 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)