10 μm粒子的可沉积位置在轴向距离-0.027 m，这意味着该粒径下的粒子在喷管直管段就可发生沉积，有可能会导致粒子与喷管内壁的粘连，进而引发枪口堵塞的现象。其余粒径粒子的可沉积位置位于喷口外部的自由射流区。其中，20 μm粒子在刚射出管口就可以实现沉积，因此该粒子喷涂距离的调控范围较广，选择性也更大；70 μm粒子在喷涂距离0.163 m之后才可实现沉积行为，而在喷涂距离0.163 m之前以类似喷丸作用的冲击为主。由点线图的整体趋势来看，可沉积粒子的初始位置随着粒径的增大而不断延长，因此需根据粒径选择合适的喷涂距离以保证粒子的可靠沉积。

The depositable position of the 10 μm particles is at an axial distance of -0.027 m, which means that particles of this size can be deposited in the straight section of the nozzle, potentially leading to adhesion of the particles to the inner wall of the nozzle and thus to the phenomenon of muzzle blockage. The rest of the particle size can be deposited in the free jet area outside the nozzle. Among them, 20 μm particles can be deposited just after the injection nozzle, so the particle spraying distance has a wider range of regulation and greater selectivity; 70 μm particles can be deposited after the spraying distance of 0.163 m, while the impact similar to the spraying action is dominant before the spraying distance of 0.163 m. From the dotted line The overall trend of the graph shows that the initial position of the depositable particles is extended with the increase of the particle size, so it is necessary to choose a suitable spraying distance according to the particle size to ensure the reliable deposition of particles.