微小重力場における気液二層環状流の流動特性に関する実験的研究 : 液膜構造におよぼす重力及び表面張力の影響

概要

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It is important for the realization of two-phase flow thermal control system to clarify the two-phase flow behavior under microgravity condition, especially an annular flow, which is the main flow pattern in the two-phase flow thermal control system. In order to evaluate the effect of the gravity and the surface tension of liquid phase on the liquid film structure, the experiments for an adiabatic gas-liquid two-phase flow in a vertical tube of 10.5 mm in I.D.were carried out under a variety of gravity condition obtained by utilizing a parabolic trajectory flight of an airplane and a drop tower. Gaseous nitrogen and water were used as the working fluids. Furthermore, to decrease the surface tension of the liquid phase, sodium oleate was added into the water. As a result, it was shown that for the higher gas velocity the effect of gravity on the liquid-film thickness was lower, however for the lower gas velocity the liquid-film thickness under microgravity became thinner than that under 1 G.
社団法人日本機械学会の論文
2000-12-25