Title: Bondgraphs model on cavitating pump system

Authors: Kazuhiro Tanaka; Toshiyuki Sato; Hiroshi Tsukamoto; Katsuya Suzuki

Addresses: Department of Mechanical Information Science and Technology, Kyushu Institute of Technology, 680-4, Kawazu, Iizuka, Fukuoka, 820-8502, Japan ' Hitachi Ltd., Infrastructure Systems Company, Tsuchiura 300-0013, Japan ' National Institute of Technology, Kitakyushu College, Kitakyushu 802-0985, Japan ' Department of Mechanical Information Science and Technology, Kyushu Institute of Technology, 680-4, Kawazu, Iizuka, Fukuoka, 820-8502, Japan

Abstract: Cavitation phenomena in a pump unit as well as internal flows can be analysed by CFD codes with meaningful precision. However, it is difficult to analyse the dynamic characteristics of cavitating pump systems such as cavitation compliance and mass flow gain factor. The characteristic parameters on pump cavitation are studied through CFD calculations on cavity volume and the results are related the system bondgraphs in a lumped parameter system. The cavitation compliance can be represented by 1-port C element and mass flow gain factor can be represented not only by 1-port R element as flow resistance but also by 1-port I element as fluid inertia.

Keywords: bond graphs; pump cavitation; dynamic behaviour; pump systems; computational fluid dynamics; CFD; turbulence modelling; Rayleigh-Plesset models; cavity volume; 1D models; cavitation compliance; mass flow gain factor; pumps; flow resistance; fluid inertia.

DOI: 10.1504/IJSPM.2015.070469

International Journal of Simulation and Process Modelling, 2015 Vol.10 No.2, pp.192 - 203

Received: 05 Mar 2014
Accepted: 07 Sep 2014
Published online: 07 Jul 2015 *

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