3710 蒸気試験・数値計算による蒸気加減弁周りの圧力変動の解明(J13-1 流動励起振動1(管内流れによる振動),J13 流体関連の騒音と振動)

概要

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A steam control valve causes vibration of the piping when the opening is in the middle condition. For the rationalization of maintenance and management in the plant, the cause of vibrations should be clarified and the valve should be improved. In previous researches, we have cralified a distinctive pressure fluctuations that may cause the vibrations and suppressed that fluctuations to improve the valve body. But, as we have adopted the air, not steam, as fluids in our previous researches, the effects of condensation and differences of fluids are not considered. In this report, we conducted the steam experiments and CFD calculations around the valve flow, and clarified the effects of the condensation and the differences of the fluids. As a result, the pressure fluctuations that is observed in the air experiment and CFD occurred in steam experiments and CFD calculations, and did not find much differences about the occurrence region of pressure fluctuations.
一般社団法人日本機械学会の論文
2006-09-15