入射衝撃波後方の低温壁面上で発生する代替フロンの非平衡凝縮 : 可視化・液膜成長の同時観測と液膜温度の上昇傾向

概要

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The aim of the present study is to investigate the nonequilibrium condensation of alternative Freon on cold wall behind the incident shock wave. To clarify the tendency of temperature increase of liquid film, one dimensional unsteady heat conduction equation has been solved using theorem of Duhamel. It has been found that except in the very beginning of nonequilibrium condensation, the temperature rise of liquid film is not influenced by initial experimental conditions. As a result of our simultaneous observations of interferometric signal from liquid film growth and flow/liquid film visualization, it is observed that many ripple and tiny disturbances have occurred on the condensed liquid film surface after the range when the interferometric light signal presenting the liquid film growth is terminated. It is thought that the disturbances strongly scatter the interfering laser beam. We consider these disturbances are originated from an instability on the film interface between vapor and liquid.
社団法人日本機械学会の論文
1999-01-25