2種類の液体で満たされ分割された高速中空回転軸の動的不安定 : 粘性および減衰を無視した場合

概要

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An investigation is made into the dynamic instability of a high-speed rotor containing a partitioned cavity filled with two kinds of liquids of different density. The system considered simulates a centrifuge of two-liquid type, in which the cylindrical cavity is divided into fan-shaped compartments in order to suppress asynchronous whirling motions induced by waves in the liquids traveling around the cavity. Assuming rotor motion to be small, liquids inviscid, and external damping negligible, perturbed motions of the system are analyzed. The theory shows that the rotor containing a partitioned cavity is still possible to exhibit unstable behavior in the region where the rotor speed is nearly equal to the sum of the critical speed of the rotor and natural frequency of the liquids. To verify the theory, experiments have been carried out. The effects of some of the system parameters on the unstable region are also discussed.
一般社団法人日本機械学会の論文
1989-03-25