液体煤油射流一般在凹腔的上游喷注，凹腔内部的燃料分布对后续点火、燃烧过程至关重要，因此喷雾向凹腔内输运的这一混合过程一直以来都备受关注。本文基于欧拉-拉格朗日框架下的两相大涡模拟方法，在来流马赫数2.0、总压1.0 MPa、总温900 K条件下对凹腔燃烧室中液体煤油射流的混合过程进行数值研究。考虑常温煤油的蒸发，关注液滴在燃烧室内运动过程中的与壁面的碰撞，重点研究了喷雾从燃烧室下壁面附近卷吸进入凹腔的过程。液滴从喷孔喷出后，在来流作用下向下游扩散，大多数液滴直接跨过凹腔，在凹腔上方主流区域向下游输运，少量（约5.2%）液滴被卷吸进入凹腔。液滴进入凹腔主要包括2种路径，一种是在凹腔前缘通过凹腔剪切层进入，另外一种是从凹腔后缘经回流区进入。在这2种路径上，液滴分别与凹腔上游的壁面以及凹腔后缘碰撞产生飞溅子液滴，飞溅子液滴之后在凹腔中广泛分布。

The liquid kerosene jet is generally injected upstream of the cavity， and the fuel distribution inside the cavity is critical to the subsequent ignition and combustion process， so the transport process of spray into the cavity has always been a concern. Based on the two-phase Large Eddy Simulation method under the Euler-Lagrangian framework， this paper numerically studies the mixing process of liquid kerosene jet in a cavity-based supersonic combustor. The incoming flow had a total pressure of 1.0 MPa， a total temperature of 900 K， and an inlet Mach number of 2.0. Considering the evaporation of kerosene at room temperature and the collision of droplets with the wall in the combustor， this paper focuses on the process of spray entrainment from the lower wall of the combustion chamber into the cavity. After the liquid droplets are injected， they diffuse downstream under the action of the incoming flow. Most of the liquid droplets directly cross the cavity and transport downstream in the mainstream area above the cavity， with a small amount （about 5.2%） of liquid droplets being entrained into the cavity. The entry of droplets into the cavity mainly includes two paths： one is through the shear layer at the front edge of the cavity， and the other is through the rear edge of the cavity. On these two paths， droplets collide with the wall upstream of the cavity and the trailing edge of the cavity to generate splashed droplets， which are then widely distributed in the cavity.