Droplet characteristics in the cavity zone of a multi-staged high speed disperser with single inlet were studied in this paper. The influences of both the operating and structural parameters on the mean droplet diameter

size distribution and liquid flux distribution were quantitatively analyzed. The result showed that the mean droplet diameter decreased with the increase of rotational speed and the number of rotors; whilst there is little influence on the inlet flow rate. In the experimental range

the minimum value of mean droplet diameter is 0.57 mm

0.48 mm

0.41 mm in the two-staged

three-staged and four-staged rotors

respectively. The Rosin-Rammler (

R-R

) distribution could describe the droplet size distribution appropriately

and it became uniform with the increase of rotational speed and the number of rotor

while the inlet flow rate had little effect on the droplet size distribution. The liquid flux distribution curves were always unimodal. With the increase of rotational speed

the location of maximum liquid flux ratio moved from zone 3 to zone 4 and this value decreased from 22.1% to 18.1%. Using Coefficient of Variation (CV) to indicate the uniformity of liquid flux distribution

it was found that the CV decreases from 47.5% to 22.7% when the number of rotor increased from 2 to 4.