旋回流による管路内圧力脈動に関する研究 : 第1報, ストローハル数タイプの励振源と管路内気柱共振の確認

概要

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An experimental investigation was carried out on the swirling flow-induced pressure pulsations in a pipe connected to a swirl generator with inlet guide vanes. As a result, the following was found : The pressure fluctuations with discrete frequencies are generated at the pipe inlet. Their frequencies are expressed by Strouhal numbers. When the fundamental frequency of the inlet pressure fluctuations coincides with the natural frequencies of the pipe, resonant pressure pulsations are generated. In the experiments, resonances of the first three modes are observed with the reduced velocities of 2. 0 -2.5 which correspond to Strouhal numbers of 0.4-0.5. So, it is concluded that the swirling flow-induced pressure pulsations in a pipe are considered as resonant phenomena caused by the Strouhal-type excitation.
社団法人日本機械学会の論文
1989-03-25