Jet Regime and Double Jet Interaction in Gas-Solid Fluidized Beds
流化床中射流机制和双射流相互作用

Experimental investigation and numerical simulation were conducted for a gassolid fluidized bed with a single jet or double jets. The jet penetration heights in a 300 mm51 mm two-dimensional fluidized bed were measured with pressure transducers. Numerical modeling and simulation was based on a two-fluid model with K(\226)52.6(\345)] model for gas turbulence. Jet formation and detachment above jet nozzle, bubble ascending and coalescence in bed, and bubble burst on bed surface were visualized by computer simulation. It was found that the behavior of the double jet system could be classified into three categories: isolated jets, transitional jets, and interacting jets. The criterions of jet separation for those categories were proposed. Jet penetration correlations were also recommended for those categories