Judgment Criteria for Cavitation Based on Jet Flow Field of V-type Valve Port

In high- and extra high- voltage systems, cavitation often occurs, which affects normal operation of the system and the service life of the hydraulic components. The paper introduces a criterion to judge cavitation through predicting the primary cavitation using the stress state rather than relying on average pressure. Based on this judgment criterion, we established a full cavitation model of incompressible gas that has cavitation characteristics to analyze the distribution of pressure, stress and the volume fracture of cavitation of V-type valve port. This full cavitation model can make reasonable prediction for the cavitation of V-type valve port.