摘要
基于专门搭建的射流破碎雾化实验平台,利用高速摄像可视化研究低速横流作用下不同气液量纲为1参数对液体射流初次破碎模式特征和射流穿透轨迹特征的影响规律。实验结果表明,低速横流作用下液体射流破碎存在柱状破碎和袋式破碎两种模式,其中柱状破碎又可以分为鼓包破碎和拱形破碎。从实验得到的液气动量通量比q和液体韦伯数Wej射流破碎模式图可以看出,液气动量通量比q和液体韦伯数Wej共同决定低速横流条件下射流破碎模式,不同破碎模式之间存在明显的过渡边界。结合液气动量通量比q、液体韦伯数Wej、液体雷诺数Rej等量纲为1参数,拟合得到了射流穿透轨迹曲线对数形式公式,该公式能够很好地预测低速横流作用下液体射流穿透轨迹,其中液气动量通量比q是影响射流穿透轨迹的主要量纲为1参数。
The experimental setup of jet breakup and atomization was established.It was visualized to study the effects of different gas-liquid dimensionless parameters on the characteristics of the breakup modes and the jet penetration trajectory under the action of low-speed air crossflow.Experimental results showed that,two breakup modes of liquid jets injected into low-speed air crossflow were attained,including column breakup and bag breakup,among which column breakup can be divided into bump breakup and arcade breakup.According to the experimental regimes map based on the q and Wej of breakup processes,the q and the Wej together determined the jet breakup mode under low-speed air crossflow conditions.The transition boundary curve between different breakup modes were found.In addition,the logarithmic formula of jet penetration trajectory curve based on dimensionless parameters such as liquid-gas momentum flux ratio q,liquid Wej,liquid Rej,can well predict the liquid jet penetration trajectory under the action of low-speed air crossflow,and the flux-momentum ratio q is the main dimensionless parameter that affects jet penetration trajectory.
作者
兰天
孔令真
陈家庆
王奎升
LAN Tian;KONG Lingzhen;CHEN Jiaqing;WANG Kuisheng(School of Mechanical Engineering,Beijing Institute of Petrochemical Technology,Beijing 102617,China;College of Mechanical Electrical and Electrical Engineering,Beijing University of Chemical Technology,Beijing 100029,China;Beijing Key Laboratory of Pipeline Critical Technology and Equipment for Deep Water Oil&Gas Development,Beijing 102617,China)
出处
《化工进展》
EI
CAS
CSCD
北大核心
2020年第4期1282-1291,共10页
Chemical Industry and Engineering Progress
基金
国家自然科学基金青年基金(21808015)
北京市高水平创新团队建设计划(IDHT20170507)。
关键词
气液两相流
液体射流
初次破碎
混合
破碎模式
射流穿透轨迹
gas-liquid flow
liquid injection
primary breakup
mixing
breakup modes
jet penetration trajectory