流体を伝える柔らかいチューブの二次元流路モデルによる数値解析

概要

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This paper presents some extension of the previous analyses by Matsuzaki and Matsumoto, in which a collapsible tube conveying fluid is modeled by a two-dimensional flexible channel made of a pair of membranes supported from the outside by distributed springs. The governing equations were solved numerically with the aid of a finite difference method. The major focus is here placed on exploring the relationship between the pressure drop across the collapsed segment, ΔΡ, and the flow rate, Q. The static ΔΡ-Q relationship for different values of external pressure is illustrated in N-shaped curves. As for the dynamic analysis, the numerical example showed that self-excited oscillations with large amplitude occurred at the flow rate where ΔΡ decreases with increasing Q. The static and the dynamic prediction agree with an early experimental finding. This channel model, therefore, provides a useful means for such an analysis.
社団法人日本機械学会の論文
1991-02-25