衝撃波管管端でのメタノール蒸気の凝縮過程に関する分子気体力学解析(流体工学,流体機械)

概要

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Film condensation phenomenon of methanol vapor at the endwall of a shock tube behind a reflected shock wave is studied by combining a shock tube experiment with a numerical analysis based on molecular gas dynamics. The present method of analysis utilizes the Gaussian-BGK Boltzmann equation, which is applicable to a strong condensation of polyatomic gases, and thereby some restrictions included in our previous method of analysis are removed. The result shows that the condensation cofficient is nearly unity when the ratio of the vapor pressure to the saturated vapor pressure at the interface is close to unity, and it decreases with the increase of the pressure ratio. Furthermore, the relations between the vapor condition and the condensation coefficient are extended to the second order so that it may contain the effect of moderately strong condensation and that of polyatomic molecules.
一般社団法人日本機械学会の論文
2005-02-25