2716 蒸気加減弁の弁体加振実験による流れの応答(J20-4 流体関連の騒音と振動(4) 流体連成振動の実験解析,ジョイントセッション,21世紀地球環境革命の機械工学:人・マイクロナノ・エネルギー・環境)

概要

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Flow induced vibrations of steam control valves cause serious damage to the valve head support systems. In order to understand mechanism of the valve head vibration, a flow response to a forced vibration of the valve head is investigated. Experiments were conducted with various valve operation conditions and frequencies of the valve head vibration. Results show that fluid force fluctuation has a phase delay behind the valve head vibration. When the phase delay is in a certain rage of value, fluid force acts as a negative damping force on the valve support system and enhances the valve head vibration. The negative damping force occurs in a certain range of an opening ratio and a pressure ratio of the valve. The frequency of the valve head vibration also affects on the phase difference between the valve head vibration and the fluid force.
社団法人日本機械学会の論文
2008-08-02