Analysis of characteristic and flow field of self operated pressure-regulating valve

In order to analyze the work performance of pressure-regulating valve,numerical calculation of the internal flow field was carried out by means of dynamic mesh.Some cases of different inlet mass flow rate or stiffness coefficient were analyzed and it came to the conclusion that the relationship between inlet pressure and mass flow rate was linear and the relationship between inlet pressure or opening of valve and stiffness coefficient was conic.With variational inlet mass flow rate,the valve can be stable and regulate the pressure and mass flow rate.