The invention discloses a
fuel oil combined atomization device applied to a small-size high-temperature-rise
combustion chamber, and relates to the technical field of aero-engines, the device comprises a first-stage axial swirler, a second-stage axial swirler and a centrifugal
nozzle, the first-stage axial swirler and the second-stage axial swirler are coaxially installed on the head portion of a
flame tube, and the centrifugal
nozzle is coaxially installed on the head portion of the
flame tube. The centrifugal
nozzle is located in the first-stage axial
cyclone, a venturi tube is further arranged between the second-stage axial
cyclone and the first-stage axial
cyclone, and a plurality of first oil spraying holes and second oil spraying holes are formed in the circumferential outer wall of the venturi tube.
Fuel oil sprayed out of the first oil spraying hole and the second oil spraying hole can be atomized through air passing through the second-stage axial swirler. According to the invention, a partitioned and pressure-divided
oil supply mode is adopted, the requirements of small
oil supply flow under the working conditions of slow running and the like and large
oil supply flow under the maximum design working conditions of climbing and the like are considered, and meanwhile, the requirements of efficient
combustion on
fuel oil atomization quality under different working conditions are met.