应用FLUENT软件,对影响前混合水射流喷丸喷嘴出口10 mm处离散相轴向速度的喷嘴几何参数中圆柱段长度、收敛角和扩散角进行正交试验,并对喷嘴内外流场中连续相和离散相的运动规律进行了系统分析。结果表明:影响离散相在喷嘴出口10 mm处轴向速度的主次因素排序为:圆柱段长度、扩散角、收敛角;连续相和离散相具有相似的运动规律,在内流场,两者轴向速度分为3个加速段和1个减速段;在外流场,核心段连续相轴向速度基本不发生改变,离散相下降缓慢,此段为喷丸最佳靶距范围;此后连续相和离散相轴向速度近似均匀下降,下降速率明显大于核心段。 By using FLUENT software, the orthogonal experiment was carried out on the length, convergence angle and divergence angle of the nozzle in the geometric parameters of the nozzle affecting the axial velocity of the dispersed phase at the exit of 10 mm from the front mixed water jet peening nozzle. And discrete phase of the law of movement were systematically analyzed. The results show that the major and minor factors that affect the axial velocity of the discrete phase at the exit of 10 mm are as follows: the length of the cylindrical section, the divergence angle and the convergence angle; the continuous and discrete phases have similar motion rules. The axial velocity is divided into three accelerating sections and one decelerating section. In the outward flow field, the axial velocity of the continuous phase in the core section basically does not change, and the discrete phase descends slowly, which is the optimal target range of shot peening. After that, And the axial velocity of discrete phase decreased approximately uniformly, the rate of decline was significantly larger than the core segment.