Abstract
The hydrodynamic behaviour of gas introduced as a horizontal jet into a two-dimensional fluidized bed of polystyrene beads has been studied by determining the gas velocity profiles. A Pitot-tube probe has been chosen to carry out the experiments. The influence of the distance from the nozzle, the gas injection velocity, the fluidization velocity and the nozzle shape on the gas velocity profiles has been examined. The asymmetry of gas velocity radial profiles has been pointed out, as well as the tendency of the jet to deviate to the top of the column, even in the linear expansion part, where gas velocity is still very high. A simple correlation is proposed, which enables to give the velocity of the gas on the jet aids as a fonction of the distance from the nozzle tip. A zone where the gas momentum on the jet axis is greater than its inlet momentum has been noticed.
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