An Investigation of Bubble Slipping Characteristics of Subcooled Flow Boiling in Narrow Rectangular Channel

The sliding bubbles in the vertical rectangular narrow channel were studied using visualization test section.It obtained the bubble sliding characteristics about the sliding distance changing with working conditions,and established the heat analysis model based on energy balance to research the impact of bubble sliding on the characteristics of heat transfer.Analysis showed that the bubble with sliding movement had a significant heat transfer enhancement than the bubble with fixed growth which did not slid.With the concept of disturbance intensity of sliding bubble proposed,it put up the heat flux expression caused by disturbance of sliding bubble and fixed bubble,and analyzed the difference between them.