Exploration on Aerodynamic Noise Characteristics for Control Valve of Steam Turbine

摘要

The flow within the control valve is rather complicated, which is induced by a variety of pneumatic sound sources, including turbulent mixing, turbulence and boundary layer interaction, shock wave, etc. Through presenting the aerodynamic noise generation mechanism, we introduce several classic prediction methods for control valve of steam turbine, and then give the suppression and elimination advises of the aerodynamic noise of the control valve. It mainly involves two approaches, the direct method -sound source approach method and the indirect method-the acoustic path approachment method, and it can provide important guidance to control the noise level for steam turbine control valve.