Experiments on the Formation Process of Bag Breakup Regime of Injected Liquid Jet into an Airstream

Document Type : Original Article

Authors

• Yosef Rezaei
• Mehran Tadjfar

Amirkabir University of Technology.

10.22067/fum-mech.v31i2.82170

Abstract

An experiment was conducted to investigate the bag breakup process of round liquid jet injected into an airstream. The liquid jet was visualized using shadowgraph technique and also a high-speed camera was used to observe the formation and breakup of bags in a water jet injected from a 2.83 mm diameter nozzle with air Weber number in the range of 0.1 to 40 and the liquid-to-air momentum ratio from 5 to 30. An analysis of the force balance on bags was conducted and a criterion for bag formation is obtained. In this study, the diameter of the bag ring and the size of the membrane of the bag are calculated. Present results indicate that the normalized ring diameter and the membrane size are constant. Results also show that the membrane of a bag grows more than its ring towards the airstream direction.

Keywords

• Bag Breakup Regime
• Liquid Jet Injection
• Airstream
• Multiphase flow

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