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针对喷雾过程喷注碰壁形成的液膜蒸发现象进行研究 ,通过理论分析和实验数据建立了相应的数值计算模型。在典型浴盆型燃烧室内 ,采用一个四孔喷嘴进行高压喷雾 ,给定初始涡流比和燃烧室壁面温度 ,对包含液膜蒸发的喷雾过程进行详细的三维数值模拟 ,获得了液滴轨迹图以及空气运动速度的空间分布和时间进程 ,为研究空气运动和壁温等参数对喷雾过程和液膜蒸发过程的影响以及它们之间的相互耦合作用打下了坚实的基础
Aiming at the phenomenon of evaporation of the liquid film formed by spraying the wall during spray process, the corresponding numerical calculation model is established through theoretical analysis and experimental data. In a typical bathtub-type combustor, a four-hole nozzle was used for high pressure spraying. The initial vortex ratio and the combustion chamber wall temperature were used to simulate the three-dimensional numerical simulation of the spray process including liquid film evaporation. The droplet trajectory and air The spatial distribution of motion speed and the time course lay a solid foundation for studying the influence of air movement and wall temperature on the spray process and liquid film evaporation process and the mutual coupling between them