振動する狭さくをもつ二次元流路内のはく離流 : 数値解析と実験

概要

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Steady and unsteady flow in a channel with an oscillating constriction is studied numerically and experimentally. A new one-dimensional flow theory is presented to describe the flow through the constriction. Both the flow separation and reattachment are included in the theory. The separated flow region is marked from a jet flow by a dividing streamline which is assumed on the basis of an available experimental observation. An experiment is performed using a two-dimensional rigid flow channel with the constriction oscillating sinusoidally with low frequencies to measure the relationship between the flow rate and the pressure distribution. Good agreement between experimental and numerical results has been obtained. Additionally, numerical simulation is carried out to evaluate the dynamic flow characteristics at a high frequency of the sinusoidal oscillation of the constriction which cannot be realized by the experimental model. The present theory is applicable to separated flow in rapidly diverging tubes such as glottis and collapsible tubes.
社団法人日本機械学会の論文
1994-03-25