邓茜茜 杨瑞华

摘要： 为了研究输棉通道位置对纤维在纺纱通道中运动的影响，文章以直径42 mm转杯为例，采用Ansys软件中ICEM-CFD建立三维抽气式转杯纺纱通道模型，在Fluent商用软件中计算连续相气体流场，根据连续相计算结果拟合离散相纤维运动轨迹。保持边界条件不变，比较输棉通道位置不同时（Y=13 mm、Y=9.75 mm、Y=6.5 mm）转杯纺纱通道内气流分布特征及纤维运动轨迹的差异。试验结果表明：Y=13 mm（工况a）时，输棉通道内气流速度与压强变化梯度最大，有利于伸直纤维;工况b时，转杯凝聚槽负压最大，纤维进入转杯能较好地凝聚汇集，有利于纤维紧密凝聚成紗;输棉通道位置过低（工况c），转杯内部涡流分布不均，不利于转杯高速平稳转动。

关键词： 转杯纺;Fluent;输棉通道;气流;数值模拟

Abstract： In order to study the influence of the fiber transfer channel position on the motion of the fiber in the spinning channel， a 42 mm-diameter rotor was used as an example to establish a three-dimensional pumping rotor spinning channel model with ICEM-CFD in Ansys software. Continuous phase gas flow field was calculated in the Fluent commercial software. The discrete phase fiber motion trajectory was fitted according to the continuous phase calculation result. The boundary conditions remained unchanged， and the airflow distribution characteristics and differences of fiber motion trajectory in the rotor spinning channel were compared when the position of the fiber transport channel was different（Y=13 mm， Y=9.75 mm， Y=6.5 mm）. The test results showed that： Y=13 mm（condition a）， the airflow velocity and pressure gradient in the fiber transport channel were the largest， which is conducive to straightening the fiber. Under working condition b， the negative pressure of the rotor was the largest， and the fiber in the rotor could be well converged， which is beneficial to the close cohesion of the fibers into the yarn. When the position of the fiber transport channel was too low（condition c）， and the vortex distribution inside the rotor was uneven， which is not conducive to the high-speed and smooth rotation of the rotor.

Key words： rotor spinning; Fluent; fiber transfer channel; airflow; numerical simulation

转杯纺作为新型纺纱的一种，具有高速度、大卷装、废落棉适纺性良好等特点。转杯纺纱时，由分梳辊对纤维须条进行开松梳理，纤维随纺纱器内负压形成的气流经过输棉通道进入转杯，在凝聚槽内汇集并合形成纤维条，经过加捻形成纱线从引纱管引出[1]。近年来，由于计算机技术的快速发展，基于计算流体动力学的数值计算方法广泛应用于纺织类领域，国内外学者通过数值计算对纺织加工技术进行研究，以优化改进纺纱方法。转杯纺在封闭空间内的高速强负压气流场中完成成纱过程，研究成纱过程中的气流场特征和纤维运动形态是分析纱线结构性能和改进成纱过程的重要手段。Kong等[2]通过……