喷气涡流纺中纤维运动的三维数值模拟  

Three-dimensional numerical simulation of fiber movement in nozzle of murata vortex spinning

作　　者：郭臻 李新荣[1,2] 卜兆宁 袁龙超 GUO Zhen;LI Xinrong;BU Zhaoning;YUAN Longchao(School of Mechanical Engineering,Tianjin Polytechnic University,Tianjin 300387,China;Key Laboratory of Modern Mechanical and Electrical Equipment Technology,Tianjin 300387,China)

机构地区：[1]天津工业大学机械工程学院,天津300387 [2]天津市现代机电装备技术重点实验室,天津300387

出　　处：《纺织学报》2019年第5期131-135,共5页Journal of Textile Research

基　　金：国家重点基础研究发展计划项目(973计划)(2010CB334711)

摘　　要：针对目前模拟纤维在喷气涡流纺喷嘴流场中运动情况,常将纤维模型简化或者建立二维模型,无法描述纤维在三维空间内的变形这个问题,建立了纤维运动三维模型,并合理设置纤维属性,使纤维运动模型更加符合实际状态。结合任意拉格朗日-欧拉法,数值模拟求解了纤维在喷气涡流纺喷嘴流场中的运动问题,并分析了纤维的运动与变形情况。结果表明:加捻室的负压导致喷嘴入口的气流流动,纤维尾端在气流中的运动十分复杂,先在乱流的影响下小幅波动,然后随时间推进振动频率和振动幅度都是先增大后减小;在流场的影响下,纤维尾端从纱线中被剥离出来,并呈螺旋形式向前行进形成包缠纤维。The simplification of the fiber model or establishment of a two-dimensional model to simulate the movement of fibers in the flow field of murata vortex spinning nozzle could not describe the deformation of fibers in three-dimensional space. In order to solve this problem, a three-dimensional model of fibers was established, and the properties of fibers were reasonably set to make the model more accurate. Combining with arbitrary Lagrangian-Eulerian method, the motion of fiber in the flow field inside the jet vortex spinning nozzle was solved under the condition of fluid-structure interaction, and the movement and deformation of the fiber in the flow field were obtained. The results shown that the negative pressure in the twisting chamber causes the air flow at the nozzle inlet. The movement of the fiber tail in the gas stream is quite complex, first under the influence of turbulence, small fluctuations occur. Then, as time advances, the vibration frequency and vibration amplitude both increase first and then decrease. Under the influence of the flow field, the fiber tail is peeled off from the yarn and spirals forward to form the wrapping fiber.

关 键 词：喷气涡流纺 纤维运动三维模型 流固耦合 数值模拟 

分 类 号：TS103[轻工技术与工程—纺织工程]