Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7055145 | International Journal of Heat and Mass Transfer | 2016 | 17 Pages |
Abstract
At high inlet pressure extent (pavg = 20 MPa) in water hydraulic fields, the relationship between inlet pressure fluctuations and unsteady cavitation process condition inside a water hydraulic poppet valve has been numerically analyzed using a two-phase mixture model via computational fluid dynamics (CFD) software ANSYS Fluent 14.5. The effects of different inlet pressure fluctuations and a groove at valve port on unsteady cavitation process and flow field are investigated. The results reveal that under sine-wave-type inlet pressure fluctuations condition, unsteady cavitation process and flow field physical parameters show periodic changing characteristics; cavitation content inside valve port is more related to the value of amplitude A and frequency f. In a certain extent, increasing or decreasing frequency f can suppress the occurrence or enhancement of cavitation. The existence of a groove at valve port can reduce the intensity of cavitation under inlet pressure fluctuations condition.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Fluid Flow and Transfer Processes
Authors
Jian Liang, Xiaohui Luo, Yinshui Liu, Xiwen Li, Tielin Shi,