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| Numerical simulation of opening process of shuttle check valve |
| LI Liang-Chao, ZENG Xiang-Wei, XIANG Ke-Feng, XU Bin, SONG Dan-Lu |
| (School of Manufacturing Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China) |
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Abstract The flow field in a shuttle check valve was numerically simulated by using the CFD method to examine whether the valve is subjected to cavitating flow during its opening process. A user defined subroutine and a dynamic mesh technique were used to involve the pool motion. The results show that the fluid flows mainly along the valve wall and backflow formed in the center of the valve during its opening process. And there have vortices existing in the shuttle valve. Cavity onsets easily in the center of the vortex as the pressure there is the lowest. The inception and development of cavitation in the valve are closely related to the inlet and outlet pressure and valve opening degree. Furthermore, cavitation can cause flow instabilities. It is demonstrated that under a certain pressure difference, the valve spool is opened to the maximum degree initially and then gradually rebound to a stable position with fluctuating steps.
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Received: 15 May 2012
Published: 30 November 2012
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