摘要
将实验与数值模拟相结合,研究剪切载荷模式横向气流场中的液体射流破碎现象,发现气流剪切层会使液柱出现明显二次弯折,液体射流破碎发生的高度随上下气流通道进口速度比UR增大而提高,同时液体射流破碎随液气动量比q的改变而出现袋式破碎、混合破碎等模式。液体射流穿透深度与q和UR均呈正相关,但与平均气流速度Uavg,g无明显相关性。液体射流发展过程中液柱的形态变化是由气动剪切力以及不平衡气流涡旋等因素共同作用所导致的。
By applying the combination of experimental method and numerical simulation method,liquid jet breakup phenomenon in shear laden mode air crossflow is studied,finding that the air shear layer may cause a significant secondary bending of the liquid column,and the jet penetration height is enhanced with the increase of the upper and lower inlet air flow velocity ratio UR.Meanwhile,the liquid jet breakup mode changes with the liquid-to-air momentum ratio q,appearing bag breakup mode,mixed breakup mode and so on.The liquid jet penetration is positively correlated with q and UR,but jet penetration is not apparently related to the averaged air flow velocity Uavg,g.The morphological changes of liquid column during the development of liquid jet are caused by a combined effect of aerodynamic shear force and unbalanced airflow vortice.
作者
邓甜
袁朝华
DENG Tian;YUAN Chaohua(Sino-European Institute of Aviation Engineering,CAUC,Tianjin 300300,China)
出处
《中国民航大学学报》
CAS
2019年第6期18-23,共6页
Journal of Civil Aviation University of China
基金
国家自然科学基金项目(51506216)
中央高校基本科研业务费专项(ZXH2012H001)
