射流喷涂技术作为一个表面工程技术，能显著提高材料综合性能。在射流喷嘴压力驱动下的局部高浓度液滴由于互相碰撞、凝并等造成的二次雾化，将直接影响液滴撞击基板前的尺寸大小和空间分布，进而决定射流喷涂的质量指标。本项目的总体构想是通过模拟平面及三维射流场中，高浓度液滴群在喷嘴出口压力驱动下由湍流运动和布朗运动所导致的碰撞、凝并等动力学事件的时空演变过程，分析液滴颗粒不同初始分布、尺度、浓度和流场中小尺度耗散涡、大尺度含能涡等共同影响下的液滴群动力学行为的发展规律，揭示在工程实际中不同工况条件对液滴群最终尺度、浓度等分布的影响机理，为改进射流喷涂技术工艺和升级改造喷涂设备提供理论支撑。

Jet spray technology as a surface engineering technology can significantly improve the overall performance of the material. The secondary atomization of local high concentration droplets, driven by jet nozzle pressure, caused by collision and coagulation, will directly affect the size and spatial distribution of the droplet before impacting to the substrate, and thus determine the indicators of the quality of the jet spray. The project is planned to simulate the space-time evolution process of the high concentration of droplets collision, caused by turbulent motion and Brownian motion, and coagulation in plane and three-dimensional jet flow. The work is also going to analyze the development law of the droplet group dynamics behavior effected by the of liquid droplet initial distribution, size, volume concentration, and the large-scale dissipation vortex, the small-scale energy vortex in the jet flow. Third, it is going to find the mechanism of drops group finally scale, concentration distribution effect by the different working conditions. Last, It will provide theoretical support to improve the jet spray technology process and upgrade spraying equipment.