【摘要】 粉体喷涂技术是一种高效环保的表面处理技术，不均匀的喷涂会直接影响产品的均一性和稳定性。本研究通过计算流体力学(CFD)模拟，结合料仓-螺旋给料装置，对粉体喷涂的均匀性进行了研究，重点分析了喷嘴几何形状、气体流速、粉体流量以及喷嘴布置对喷涂效果的影响。结果表明，两侧略宽的一字形喷嘴在喷粉均匀性上表现优异。过短的变径段使惯性效应占主导，导致中心区域浓度偏高，而过长的变径段则在两侧产生浓度高峰。适中的气体流速能够有效增强喷粉的均匀性，降低粉体流量则进一步提高了粉体的弥散性能和均匀性。此外，喷嘴交错排列显著减少了相邻喷嘴间的流场干扰，改善了喷粉的稳定性。通过优化喷嘴几何设计、调节气体和粉体流量以及合理布置喷嘴，可以有效提高粉体喷涂的均匀性与稳定性，为粉体喷涂技术的进一步发展提供了重要参考。更多还原

【Abstract】 Powder spraying technology is an efficient and environmentally friendly surface treatment method, where uneven spraying directly affects the uniformity and stability of the product. This study uses computational fluid dynamics(CFD) simulations, combined with a silo-spiral feeding device, to investigate the uniformity of powder spraying, focusing on the effects of nozzle geometry, gas flow rate, powder flow rate, and nozzle arrangement on spraying performance. The results indicate that a slightly wider linear nozzle performs exceptionally well in achieving uniform powder spraying. A contraction section that is too short leads to dominant inertial effects, causing higher concentration in the central region, while an excessively long contraction section results in concentration peaks on both sides. An optimal gas flow rate effectively enhances spraying uniformity, while reducing the powder flow rate further improves powder dispersion and uniformity. Moreover, staggered nozzle arrangements significantly reduce flow field interference between adjacent nozzles, improving the stability of powder application. By optimizing nozzle geometry, adjusting gas and powder flow rates, and arranging nozzles rationally, the uniformity and stability of powder spraying can be effectively enhanced, providing valuable insights for the further development of powder spraying technology.更多还原