Stability Analysis of Compressible Viscous Circular Jet

doi:10.19596/j.cnki.1001-246x.8479

Abstract

Abstract:

Mechanism of splitting and atomization of compressible viscous 。ular jet was studied with linear stability theory. The dispersion equation for disturbance development of liquid jet surface in space mode was obtained and verified. It shows that the influence of liquid compressibility on instability of liquid jet is very small. With the increase of Mach number of liquid, the maximum growth rate of disturbance wave is basically unchanged. Effect of gas compressibility on jet stability increases with the increase of gas Mach number. With the increase of Reynolds number and Weber number, the effect of viscous force and surface tension on jet stability decreases gradually. With the increase of gas-liquid density ratio, the effect of aerodynamic force on jet stability is basically unchanged.

Key words: liquid jet, compressible, flow stability, dispersion equation, splitting and atomization

Hua ZHANG, Minghui YANG. Stability Analysis of Compressible Viscous Circular Jet[J]. Chinese Journal of Computational Physics, 2022, 39(5): 529-536.

Figures/Tables 6

Fig.1 Jet diagram

Fig.2 Influence of liquid Mach number Ma1 on the growth rate of disturbance wave (a) Wave number kr- Disturbance wave growth rate ki; (b) Ma1 - Maximum disturbance wave growth rate ki-max

Fig.3 Influence of Mach number Ma2 on the growth rate of disturbance wave (a) Wave number kr-Disturbance wave growth rate ki; (b) Ma2-Maximum disturbance wave growth rate ki-max

Fig.4 Influence of Weber number We on the growth rate of disturbance wave (a) Wave number kr-Disturbance wave growth rate ki; (b) We-Maximum disturbance wave growth rate ki-max

Fig.5 Influence of Reynolds number Re on the growth rate of disturbance wave (a) Wave number kr-Disturbance wave growth rate ki; (b) Re-Maximum disturbance wave growth rate ki-max

Fig.6 Influence of gas-liquid density ratio Q on the growth rate of disturbance wave (a) Wave number kr-Disturbance wave growth rate ki; (b) Q-Maximum disturbance wave growth rate ki-max

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