Analysis of the characteristics of air–yarn coupling movement in the profiled reed groove of an air-jet loom
Analysis of the characteristics of air–yarn coupling movement in the profiled reed groove of an air-jet loom
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DOI：
10.1177/00405175211056979
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发表时间：
2021-11
影响因子：
2.3
通讯作者：
Yuzhen Jin;Hailang Xiong;Jingyu Cui
中科院分区：
文献类型：
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作者：
Yuzhen Jin;Hailang Xiong;Jingyu Cui
纱线在喷气织机异形筘槽中的运动特性对织物的性能有很大的影响。不稳定的纱线运动往往会导致纬纱缺陷，因为可能会出现短纬或断纬，这可能会降低最终织物的质量。本文对异形筘槽中纱线的运动特性进行了数值研究。采用任意拉格朗日-欧拉法求解气流与纱线的双向相互作用，纱线采用球窝模型模拟。定义波动率来表征纱线运动的不稳定性。首先研究了异形筘槽差距比β对纱线运动的影响，然后比较了不同纱线的运动情况。模拟结果表明，较大的β值不仅可以减少气体泄漏（从而节省气体消耗），而且可以稳定纱线运动。模拟结果还表明，聚丙烯纱线的运动比其他两种纬纱材料更稳定。最后通过实验验证了数值计算结果的正确性。本文对异形筘槽内纱线运动的数值模拟结果，为喷气织机引纬系统的优化设计提供了有价值的参考。
The movement characteristics of yarn in the profiled reed groove of an air-jet loom can have a great impact on the performance of the fabric. Unstable yarn movement tends to lead to weft defects, as short wefts or weft breaks may occur, which could deteriorate the quality of the final fabric. In this paper, the characteristics of the yarn movement in a profiled reed groove are numerically studied. The arbitrary Lagrangian–Eulerian method is used to solve the two-way airflow–yarn interaction and the yarn is simulated with the ball–socket model. A fluctuation ratio is defined to characterize the unsteadiness of the yarn movement. Our simulation first investigates the effect of the gap ratio of the profiled reed groove (β) on the yarn movement then compares the movements of different yarn kinds. The simulation results indicate that a larger β not only decreases gas leaks (thus saves gas consumption), but also stabilizes the yarn movement. Our simulation results also show that the movement of the yarn of polypropylene is more stable than the other two weft-yarn materials. An experiment is also conducted to validate our numerical results, which shows a favorable agreement between them. Our numerical results of the yarn movement in the profiled reed groove can provide a valuable insight into the optimization of the weft insertion system of the air-jet loom.