GAS AND PARTICLE FLOW PATTERNS IN CYCLONES AT ROOM AND ELEVATED-TEMPERATURES

Experimental results are presented for a study of gas and particle flo ws in a 102 mm diameter conventional cyclone operated at temperatures between 300 and 2000 K. Inlet gas velocities ranged from 3 to 42 m/s. Particle deposition patterns and the measurements of local pressures w ere used to determine the flow patterns and velocity profiles within t he cyclone. A ''Reynolds Number'' has been defined based on the mean i nlet velocity and the hydraulic diameter of the annulus between the cy clone wall and the gas outlet duct. An empirical equation was derived to correlate the ratio of the wall tangential velocity to the mean inl et velocity with this Reynolds Number.