255 ターボポンプで発生する軸方向旋回すきま流励起振動

概要

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In the centrifugal turbopump, the axial vibration of a rotating shaft is induced by swirling leakage flow under certain operating conditions. In this paper, based on the numerical model simulating the balance piston, the stability of the axial vibration under irrotational shaft condition is evaluated analytically. In addition, by the experimental equipment simulating the balance piston, the stability of the axial vibration for the shaft rotational speed and the swirl number are evaluated experimentally. As the analytical result, it is noted that the rise of the swirl number is connected with the stabilization of the axial vibration when the shaft is irrotational. The experimental result shows that the rise of the shaft rotational speed is connected with the stabilization of the axial vibration.
一般社団法人日本機械学会の論文
2011-09-05