双流体喷嘴荷电雾化特性

针对压力雾化难以雾化高粘度液体的问题,设计了双流体喷嘴,利用气体动能提高雾化效果.以空气、水为介质,对双流体喷嘴进行了试验研究,测量得出了各控制参数间的互相牵制关系,发现了气液流量之间的一般规律.改变气液压力可以有效改变喷量与雾滴粒径以满足不同雾化要求,雾化片孔径的大小对雾化特性的影响很大.电极电压增大,荷质比随之增加,并从理论上进行探索,分析得出了当荷电雾滴荷质比达到分裂极限时,雾滴将进一步破碎雾化.试验表明,该喷嘴具有气耗低,喷量调节范围宽的特点,对高低粘度液体均能有效雾化,荷上静电以后,液滴粒径更加细小、均匀.

Charged atomization characteristics of two-fluid spray nozzle

Because the pressure atomization can not atomize high viscosity liquid effectively, a new nozzle is designed by using gas kinetic energy, with air and water as working fluids. In the experiment of two- fluid spray nozzle, the relationship between controlling parameters is developed. Liquid flow and droplet diameter can be changed by changing gas pressure or liquid pressure. Aperture of atomization flake has great impact on atomization. Charge-mass ratio increases with electrode voltage. When charge-mass ratio reaches the breakup limit, charged droplet breaks. The experiment indicates that the nozzle with wide flow range needs less gas to atomize high viscosity liquid, and charged droplet diameter gets smaller and more uniform.