Heat release effects of reacting gas jets in liquids

An experimental study of a hydrogen chloride gas jet reacting in an aqueous solution of ammonia was conducted. The profile of the gaseous jet penetration (plume) exhibited a periodic or cyclic change, involving spherical growth, axial expansion, and necking often accompanied by detachment and collapse. Similar periodic fluctuations were observed in the bath pressure measurements. It is believed that the observed plume mostly consists of ammonia vapor produced due to reaction heat release and that the periodic behavior is caused by the growth and collapse of the ammonia vapor. It was possible to correlate a large amount of plume length data based on the notion that the plume length is determined by the distance required for condensation of the ammonia vapor. The characteristics of pressure fluctuations depended strongly on the bath subcooling, resembling those for vapor jets condensing in liquids.