Logo IFK

10. Internationales Fluidtechnisches

8. - 10. März | 2016
in Dresden

Tagungsprogramm (pdf-Version )

Die vollständige Tagungsbroschüre finden Sie als pdf-Datei zum download hier.



14:10   ics       Großer Saal

Visualization of cavitation and investigation of cavitation erosion in a valve

First author:
Dominik Krahl, TU Dresden, IFD, Germany

Jürgen Weber, TU Dresden, IFD
Maik Fuchs, Bürkert Werke GmbH

Avoiding cavitation and especially cavitation erosion are tasks, which have to be considered when working with hydraulics. State of the art is the assessment of the risk of erosion by component testing or to completely avoid cavitation by means of CFD. Another reliable method to assess the risk of cavitation erosion is until now not available. This paper deals with this problem and delivers comparative values for a later method development. In a first step the cavitation of a poppet valve, which controls a methanol flow, is visualized. The resulting three cavitation appearances are deeply examined. After that the results of long-term tests at different operation conditions are presented. A poppet surface analysis following each experiment has shown different types of surface attacks. As a result of this work it is shown that both cavitation appearance and surface attack are strongly influenced by the temperature dependent air solubility of the liquid.