3821 コンプレッサ圧力脈動によるドラムの高周波振動に関する検討(J15-2 流体関連の騒音と振動(2)-管内流れ-,J15 流体関連の騒音と振動,2005年度年次大会)

概要

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Rotary compressor generates pressure pulsations in blade passing frequencies, and the pulsations may cause severe vibrations of drums downstream of compressors in high frequency region, resulting in material fatigue failure under certain conditions. Experiments and numerical simulations were performed to investigate the mechanism of the high frequency vibrations of the drums. The results show that fatigue failure occurs when acoustic diametral modes of a drum are excited by pressure loading. In order to establish practical countermeasures against the vibrations, three-dimensional sound-structural coupled analysis as well as one-dimensional pulsation analysis were conducted. As a result, practical measures such as changing diameter, or thickness of the drums, applying restriction orifice are confirmed effective by using the approach proposed in this study. The validity of the simulation methods incorporating the sensitivity to the fluid conditions is shown.
社団法人日本機械学会の論文
2005-09-18