Numerical investigation of cavitation flow inside spool valve with large pressure drop

9th International Symposium on Cavitation

Deng, Jian^1 ; Pan, Dingyi^1 ; Xie, Fangfang^1 ; Shao, Xueming^1

State Key Laboratory of Fluid Power Transmission and Control, Department of Engineering Mechanics, Zhejiang University, Hangzhou

310027, China^1

关键词: Cavitation model;    Fluid power systems;    Hydrodynamic performance;    Local pressures;    Numerical investigations;    Numerical tools;    Structure damage;    Throttling area;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/656/1/012067/pdf
DOI  :  10.1088/1742-6596/656/1/012067

来源: IOP

【 摘 要 】

Spool valves play an important role in fluid power system. Cavitation phenomena happen frequently inside the spool valves, which cause structure damages, noise and lower down hydrodynamic performance. A numerical tools incorporating the cavitation model, are developed to predict the flow structure and cavitation pattern in the spool valve. Two major flow states in the spool valve chamber, i.e. flow-in and flow-out, are studies. The pressure distributions along the spool wall are first investigated, and the results agree well with the experimental data. For the flow-in cases, the local pressure at the throttling area drops much deeper than the pressure in flow-out cases. Meanwhile, the bubbles are more stable in flow-in cases than those in flow-out cases, which are ruptured and shed into the downstream.