超臨界雰囲気中の軸対称燃料ジェットの線形安定性解析

概要

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Linear stability analysis was performed for a hydrocarbon liquid fuel jet (butane) issued into stagnant gas (nitrogen) whose pressure and temperature exceed critical values of the fuel. There are two types of flow instability ; one is the Rayleigh type and the other is the Taylor type. The Rayleigh type instability is based on the radius of liquid fuel jet as a reference length, while the Taylor type instability is based on the boundary layer thickness. As results, the growth rate of instability waves depend on the square root of Weber number and the thermodynamic phenomenon such as phase equilibrium and evaporation. Within this high pressure-temperature environment, the liquid fuel jet experiences sub-to-supercritical transition and changes the method of mass transfer at the gas-liquid boundary and lose surface tension. So the fluid-dynamic instability can be strongly affected by the thermodynamic conditions and physical properties.
一般社団法人日本機械学会の論文
1998-09-25