Cavitation CFD analyses considering the pressure wave propagation within the piping systems

29th IAHR Symposium on Hydraulic Machinery and Systems

Nohmi, Motohiko^1 ; Kagawa, Shusaku^2 ; An, Byungjin^1 ; Tsuneda, Tomoki^1 ; Yokota, Kazuhiko^3 ; Kang, Donghyuk^4

EBARA Corporation, Fujisawa-shi, Japan^1

EBARA Corporation, Futtsu-shi, Japan^2

Aoyama Gakuin University, Sagamihara, Japan^3

Saitama University, Saitama City, Japan^4

关键词: Cavitation model;    Distributed modeling;    Hydraulic devices;    Method of characteristics;    Noise and vibration;    Oscillation frequency;    Pressure wave propagation;    Unsteady phenomena;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/240/6/062025/pdf
DOI  :  10.1088/1755-1315/240/6/062025

来源: IOP

【 摘 要 】

Cavitation surge is a typical unsteady phenomenon and can be a cause of severe noise and vibration problems in hydraulic systems. When the oscillation frequency of the piping systems surrounding the hydraulic devices under cavitation surge is high and/or the pipe length is long, the acoustic wave propagation within the piping systems must be considered. In this study cavitation is computed by two dimensional CFD with cavitation model and the pressure wave in the piping systems is computed by one dimensional distributed model of Method Of Characteristics (MOC). The cavitation CFD and MOC calculations are coupled through boundary conditions. The interactions of cavitation and pressure wave are observed in the computed results.