116 温度制御可能な衝撃波管の開発とその気液非平衡相変化研究への応用(O.S.1-4 熱現象・分子動力学)(O.S.1 電子・イオン・分子の流れ)

概要

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A shock tube available at the state of initially high temperature is made and it is used for the measurement of the growth rate of a liquid film formed on the endwall surface of the tube in shock wave reflection region. It is found that the shock tube satisfies requirements for the experiment and the liquid film grows uniformly on the endwall surface at high temperature. The condensation coefficient of methanol vapor is determined from the growth rate of the liquid film at normal initial temperatures and 50℃. It is clarified that the condensation coefficient is strongly dependent on thermodynamic nonequilibrium degrees which are defined by the temperature and number density ratios of vapor and liquid at the vapor/liquid interface. For the same temperature and number density ratios, the higher is the liquid temperature, the smaller becomes the condensation coefficient, and it decreases with the increase of the number density ratio.
2001-09-28