Liquid jet breakup in shear-laden mode air crossflow

Abstract

Abstract: By applying the combination of experimental method and numerical simulation method, liquid jet breakup phenomenon in shear laden mode air crossflow is studied, finding that the air shear layer may cause a significant secondary bending of the liquid column, and the jet penetration height is enhanced with the increase of the upper and lower inlet air flow velocity ratio UR. Meanwhile, the liquid jet breakup mode changes with the liquid-to-air momentum ratio q, appearing bag breakup mode, mixed breakup mode and so on. The liquid jet penetration is positively correlated with q and UR, but jet penetration is not apparently related to the averaged air flow velocity U _avg,g. The morphological changes of liquid column during the development of liquid jet are caused by a combined effect of aerodynamic shear force and unbalanced airflow vortice.

Key words: shear-laden mode crossflow, liquid jet, numerical simulation, jet penetration

CLC Number:

V231.3

DENG Tian, YUAN Chaohua. Liquid jet breakup in shear-laden mode air crossflow[J]. Journal of Civil Aviation University of China, 2019, 37(6): 18-23.

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