中文摘要：

为了考察液滴的撞击对液膜变形行为的影响规律,利用CLSV0F （ coupled level set and volume of fluid） 方法模拟双液滴同时撞击平面液膜后的流动过程,获得了不同水平间隔距离、不同撞击速度的两液滴撞击平面液膜后的演变过程特点,通过分析不同时刻压力场分布,探索了两液滴水平间隔距离、韦伯数和撞击速度对双液滴同时撞击液膜后流动过程、形态及对水花高度和中心射流高度的影响.结果表明,碰撞速度较大时的中心液膜射流高度大于碰撞速度较小时的; We数较大时中心射流顶端将产生二次液滴;液滴间距对撞击后初始时（ 3 ms之前）撞击点两侧的开始水花高度没有明显影响.

英文摘要：

To investigate the effects of double droplet impact on the dynamic deformation of liquid films, the cou?pled level set and volume of fluid ( CLSVOF) method was applied to simulate the evolution of double droplets after simultaneously impacting a flat liquid film. The evolution process was recorded at different horizontal distances be?tween the droplets and different impact velocities. By analyzing the pressure field distribution at different moments, effects of the horizontal distance, Weber number, and impact velocity on the flow process, shape, spray height, and center jet height of the double droplets were studied. The results show that:the center jet height is larger when the impact velocity is greater;secondary droplets emerge at the top of the center jet when the Weber number is lar?ger;the horizontal distance between the two droplets has no obvious effect on the initial spray height on both sides of the impact spot at the initial period ( before 3 ms) .