In the first trial-manufacture of an aero-engine centrifugal fuel nozzle

the spray angle is smaller than design requirements

through theoretical analysis

formulate measures for a variety of commissioning process

and has carried out experimental study. Tests show that measures for reducing swirl angle

reducing spout length

increasing spout diameter

reducing swirl chamber length and reducing swirl tank depth can increase the spray angle to a certain extent. Eventually

we adopted double angle rubbing process

combined with the measures for decreasing the swirl tank depth

has reached the design requirements of the spray angle.