喷气涡流纺喷嘴结构对流场影响的研究进展

Research progress in influence of vortex spinning nozzle on flow field

喷嘴作为喷气涡流纺的关键部件,其结构参数(前罗拉夹持点到空心锭子距离、导引体结构、喷气孔结构、空心锭子结构、涡流室结构等)对纺纱质量有重要影响。回顾了喷嘴结构的基础研究进展,分析了关于喷嘴结构的研究方法以及数值模拟的应用。总结了主要结构参数对纺纱质量的重要影响;对比了单独考虑流场、考虑纤维与气流耦合以及纺纱实验的研究方法得到不同最优结构参数的原因,阐述了仅依托流场分析的不足之处;提出应选用合适的流场分析模型,同时考虑纤维特性的分析会更有价值。最后展望了喷嘴结构研究未来发展方向,以期共同推进喷气涡流纺技术的快速发展。

Abstract The structural parameters （the distance from the front roller nip point to the inlet of hollow spindle, guidance body structure, jet orifice structure, hollow spindle structure, and vortex chamber structure） of nozzle play a significant role in determining the spinning quality. The fundamental research progress in nozzle structure was reviewed. The advancement of nozzle structure techniques and the associate numerical simulation method on practical nozzle structure optimization is analyzed. In addition, the important influence of the main structural parameters on the spinning quality through the existing research was emphasized, and the causes of different optimal structural parameters on flow field was analyzed by studying the coupling of fiber and airflow and the spinning experiment. The shortcomings of relying on flow field analysis separately were expounded. It is suggested that the appropriate flow field prediction model should be selected and the analysis considering fiber properties is more valuable. Finally, it is suggested several meaningful conclusions and recommendations for future direction, facilitating the fast development of this wonderful vortex spinning technology.