The nozzle size was changed and designed

based on a commercial electromagnetically driven scroll nozzle

and analyzed the mass flow rate

spray development process

atomization angle

nozzle delay and particle size distribution through experiments. The results show that: The mass flow rate of optimized nozzle is higher than that of original nozzle

and linearity of mass flow rate is close to that of original commercial nozzle. When the nozzle diameter increased from 0.55mm to 0.7mm

the spray development was faster

the fuel flow rate increased by 56%

the atomization angle increased by 10 degrees

but the spray instability increased

and particle size increased

under the same injection time (5ms) and injection pressure (9.5MPa). The atomization angle varies greatly under different injection pressure

and the spray profile near nozzle is related to the design of the orifice

and the mass flow rate will increase with the increase of injection pressure. When the injection pressure rises

the volume fraction of the atomized particle size distribution in range of 10μm~20μm will increase accordingly

which can improve the atomization.