すきま流励起振動に関する研究 : 第1報,一次元テーパすきまの壁面に作用する流体力の評価

概要

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An analytical study is presented on leakage-flow-induced vibrations in the case of a one-dimensional, narrow, tapered passage. The fluid-dynamic forces acting on the walls of the passage when one of them is vibrating harmonically with a small amplitude are obtained as the sum of two components : one proportional to the wall velocity and the other proportional to the wall displacement, from which fluid-dynamic coefficients are determined as a function of frequency. It is found that if the passage is divergent, both negative fluid-dynamic stiffness and negative fluid-dynamic damping can occur, and that negative fluid-dynamic stiffness can occur in the case of a high exit loss factor even if the passage is parallel or convergent.
社団法人日本機械学会の論文
1987-04-25