Numerical Analysis of Aerodynamic Noise in a High Parameter Pressure Reducing Valve

The high parameter pressure reducing valve (PRV) is a key device for regulating gas pressure in industrial processes. For the large flow and the instability of the high pressure and high temperature steam, the noise of the working PRY is large and also its energy consumption. A numerical analysis of the flow field and acoustic field of the inner high parameter PRY was conducted, the main cause of the aerodynamic noise was analyzed. Basing on the RNG k-s Model and the Broadband Noise Source Model, the flow and acoustic power are calculated. Comparing the distribution of acoustic power level with the distribution of the velocity and turbulent intensity, it is shown that the main reasons for noise in the PRY are forming and shedding alternately vortexes and shock waves of jet flow.