The atomization characteristics of a new type air assisted atomizer have been investigated for heavy oil with Engler viscosity more than 20
and compared with "Y" type atomizer commonly used in industry.A standard diffraction based sizing system (i.e.Malvern) is applied to this investigation .The results reveal the influences of the air pressure
fuel pressure
and air/fuel ratio on the atomization characteristics
the influence of the fuel pressure on the spray angle
and demonstate the fuel atomization superiority of this new-type atomizer over the "Y" type atomizer in atomization.