Abstract
A steam control valve is used to control the steam flow from a steam generator to a turbine in power plants. The flow field in the steam control valve is usually complex and transonic. A flow-induced vibration of the valve can occur and may cause unexpected shutdown. An experimental and numerical study is conducted to clarify the characteristics of the flow in the steam control valve. In the present study, characteristics of the flow fluctuation around the valve, a pressure fluctuation caused by acoustic resonance and a fluid structure coupled vibration of the valve head has been investigated. The experimental results show the operating condition where these vibrations occur. The numerical results show detailed flow fields and causes of them.
