摘要
采用数值模拟的方法对一种低压双层雾化器(Double Layer Atomizer)气流场和雾化过程进行了研究,分析了上层雾化器对气流循环区域以及金属液流雾化的影响。结果表明:上层雾化器的引入能有效抑制气流循环区域的不良影响,有利于金属液流的稳定流动;考虑到上层雾化器压力的增大会引起气流循环区域压力的增大以及流量的增加,选择0.15MPa/0.68MPa^0.2MPa/0.68MPa的压力条件较为有利;该双层雾化器液流破碎过程存在一定的类似于紧密耦合式雾化器(Close-Coupled Atomizer)的膜状破碎方式,破碎液滴在空间飞行发散范围和其粒径大小有关。
Using a computational fluid dynamics（ CFD） software,the gas flow field and atomization process of an low pressure double layer atomizer were investigated to discuss the effect of primary atomizer on gas recirculation zone and liquid metal atomization. Results show that primary atomizer can restrain adverse effect of the recirculation zone,which is beneficial to liquid metal flow. Considering that increasing primary atomizer pressure could raise gas mass flow rate,0. 15 MPa /0. 68MPa-0. 2MPa /0. 68 MPa conditions are beneficial. The liquid atomization process of this double layer atomizer contains membrane disintegration process which is similar to closecoupled atomizer,and the droplets distributions relate to their diameters.
出处
《航空材料学报》
EI
CAS
CSCD
北大核心
2015年第5期63-69,共7页
Journal of Aeronautical Materials
基金
国家863项目(2012AA03A514)
国家863项目(2013AA031103)
国家自然基金项目(51301157)
国家国际科技合作专项资助项目(2012DFA50240)
关键词
双层雾化器
数值模拟
气流循环区域
液流破碎
double layer atomizer
numerical simulation
air recirculation zone
liquid disintegration
