Bag breakup of round liquid jets in crossflow

An experiment was conducted to investigate bag breakup process of round liquid jets in crossflow. High-speed camera was used to observe the formation and breakup of bags. The diameter of the nozzle used in the experiment was 1.0 mm. And the test liquid was tap water. We number covered the range of 11~23, and liquid-to-air momentum flux ratio varied from 11 to 95. Present results indicate that the dimensionless onset length of bags (lonset/d) is linear to In (q/Re), while the dimensionless onset time is almost a constant. With We increasing, the bag breakup length decreased linearly, and was unrelated to liquid jet velocity. Finally the relationship between jet breakup point and liquid-to-air momentum ratio was studied, and it was found that the breakup position in the stream direction was always the same while the distance in the crossflow direction was increased with In (q) linearly.