気泡流中における衝撃波の伝ぱ : 第4報,均一気泡分布時の実験と理論との比較(流体工学,流体機械)

概要

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Transient shock wave phenomena in a liquid containing non-condensable gas bubbles are studied experimentally and numerically. In order to obtain a uniform spatial distribution of bubbles experimentally, an upwardly directed bubbly flow, whose initial gas volume fraction is 0.2%, is generated in a shock tube. The liquid used is silicone oil. Nitrogen, argon, and SF_6 gas bubbles are tested to show the thermal effects of the bubble interior. The transient pressure profiles determined in the experiments for the upwardly bubbly flow agree well quantitatively with those obtained by numerical calculation using a uniform spatial distribution of bubbles. Since the thermal diffusivity of SF_6 is much lower than that of nitrogen and argon, the damping on the radial oscillation of the SF_6 bubble is mainly due to the compressibility of the liquid. Thus, the radial motion of the bubble should be estimated by solving an equation in which the liquid compressibility is taken into account.
一般社団法人日本機械学会の論文
1997-07-25