A similarity model of evaporating liquid spray jets in concurrent gas-solid flows

A simple analytical model of spray jet evaporation in gas-solid suspension flows has been developed, which is based on the extension of similarity cor relation from two-phase jets to three-phase jets. Effects of particle conce ntration, ambient temperature, and solids thermal capacity on the jet struc ture are illustrated. It is found that the evaporation length can be signif icantly shortened by the increase of particle concentration while the jet b oundaries are expanded. Similar reductions in the jet evaporation region ca n also be attained by elevating the ambient temperature or by using higher thermal capacity solids. Comparison of jet evaporation lengths from the mod el predictions and previously reported experiment results suggests that the proposed similarity approach is reasonable. (C) 2001 Elsevier Science B.V. All rights reserved.