摘要
Abstract
Pneumatic nebulization has many problems such as complicated structure of nozzle and droplets atomized uneven.Three kinds of gas channels with 30 degrees, 45 degrees, 60 degrees of nozzle were designed in this experiment,based on pneumatic atomization mechanism,and water was used as working fluid.The effect of gas-liquid ratio,gas channel opening angle, gas pressure on the particle size, spray width and deposition amount of nozzle′s atomization droplet were measured by phase Doppler particle instrument.The results show that,the effect of gas-liquid ratio on the droplet size is obvious compared to the flow and pressure parameters of the gas -liquid interface.With the increase of gas-liquid ratio,the droplet size becomes smaller,and the atomization particles are more uniform.The effect of gas-liquid ratio on spray width is also obvious.With the increase of gas-liquid ratio, the spray angle ratio and the spray width will increase subsequently, the droplet deposition in the spray width is normal distribution.The design of pneumatic spray nozzle atomizing effect is greatly improved.关键词
气动雾化/气液比/雾滴粒径/喷雾宽度/雾化沉积量Key words
aerodynamic atomization/gas-liquid ratio/drop diameter/spray width/atomization deposition分类
机械制造
