液中における多孔板の気泡生成による自励振動

概要

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A gas and liquid reaction column exists in a petrochemical or a chemical plant, in which many perforated plates, or sieve trays are spaced at regular intervals. In such a column an unstable vibration by fluid force occurs at the sieve trays under a certain condition, and this vibration excites the column structure. For the purpose of investigating the cause and the mechanism of the instability and obtaining the useful data for the tray design, some experiments were carried out by using a visible experimental apparatus, that is, a two-dimensional model of an actual column. From the analysis of tray vibration and bubbling at submerged orifices, it was found that the excitation force which causes the tray vibration is pressure fluctuation of gas after the bubbling synchronizing the tray vibration and a self-excited vibration system is formed between the structural vibration of tray and the pressure fluctuation due to bubble formation.
一般社団法人日本機械学会の論文
1989-03-25