Linear stability analysis of liquid jet exposed to subsonic crossflow with heat and mass transfer

Abstract

A linear temporal stability analysis of liquid jets exposed to subsonic crossflow with heat and mass transfer is reported in this paper. The effect of heat and mass transfer at the interface was represented by an existing heat flux ratio of the conduction heat flux to the evaporation heat flux. A new model, describing the physical processes of heat and mass transfer at the interface, was established to solve mathematical difficulties occurring with the heat and mass transfer effect on a cylindrical jet. The model revealed that, when the density ratio was relatively small, the enhancement of heat and mass transfer stabilized the liquid jet for both breakup modes. The coupling effects of heat and mass transfer and density ratio on the instability features also showed that sensitivity of growth rate to heat and mass transfer was linked to density ratio. The maximum growth rate decreased noticeably with the introduction of heat and mass transfer when the density ratio was close to zero. The effects of flow parameters, such as velocity ratio, on the instability features were also studied.