Based on Weber number, the process of spray impingement is divided into three independent models: stick, rebound/ stick and splash/ tangential jet. The mathematical models of the fuel droplet breakup and the spray impingement are established. 根据Weber数将喷雾碰壁过程分为粘附、反弹粘附和飞溅附壁射流3种模式,建立了油滴破碎和喷雾碰壁的数学模型。