JSME international journal. Ser. 3, Vibration, control engineering, engineering for industry
Print ISSN : 0914-8825
A Study on Leakage-Flow-Induced Vibrations : Fluid-Dynamic Forces Acting on the Walls of a One-Dimensional, Narrow Passage
Fumio INADAShinji HAYAMA
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1988 年 31 巻 1 号 p. 39-47

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In this paper, Ieakage-flow-induced vibrations are discussed in the case of a one-dimensional, narrow passage in which one of them is vibrating harmonically with a small amplitude. First, the fluid-dynamic forces acting on the walls of the tapered passage are analyzed. Second, the transfer matrix method is applied to the calculations of fluid-dynamic forces in the case of an arbitrary-shaped passage. The fluid-dynamic coefficients in the case of a tapered passage are calculated to check the accuracy of this method, and those in the case of the passage with a step are also calculated. It is found that if the cross-sectional area of the upstream passage is smaller than the downstream one, both negative fluid-dynamic stiffness and negative fluid-dynamic damping can occur in both the cases of a tapered passage and a passage with a step.
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© The Japan Society of Mechanical Engineers
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