Effect of Spray Pressure on the Atomisation Effect of Dual Media Nozzles

Efficient atomisation of spices is an important part of the tobacco dosing process. In order to study the effect of spray pressure on the atomisation effect of dual media nozzles, a DPM model was used based on Fluent software to analyse the atomisation characteristics of dual media nozzles in a vertical simulation. The results show that: in the liquid phase flow rate is fixed, with the increase in injection pressure, the effective spraying distance of nozzle atomization increases; the maximum particle size, minimum particle size and average particle size of the droplet particles are reduced with the increase in pressure, in the injection pressure of 0.5Mpa when the smallest diameter of the Sotaier flat, that is, the atomization fineness is the best. And at the same pressure, the average diameter of droplets on two cross-sections 1 m and 1.5 m from the injection port varies within 2%. Between 0.1 and 0.6 Mpa, the uniformity of atomisation on both cross-sections becomes better with increasing pressure. The uniformity of droplet velocity distribution on the same cross-section becomes worse as the injection pressure increases; droplet velocity decreases with increasing injection distance at the same injection pressure.