Numerical Study on the Principle of Yarn Formation in Murata Air-Jet Spinning
Numerical Study on the Principle of Yarn Formation in Murata Air-Jet Spinning
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村田喷气纺纱成纱原理的数值研究
DOI：
10.4188/jte.53.173
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发表时间：
2007
影响因子：
--
通讯作者：
Chongwen Yu
中科院分区：
文献类型：
--
作者：
Huifen Guo;Xianglong An;Chongwen Yu
采用可实现的k-ε湍流模型，对村田喷气纺纱（MJS）的两个喷嘴（包括开槽管）内的气流流动特性进行了研究。讨论了两种喷嘴的作用和公认的成纱原理。结果表明，第一喷嘴内的一些因素，如喷嘴上游的弱反旋气球、喷嘴下游的涡流破裂以及槽道与加捻室之间的反向气流，有利于产生较长的包缠纤维，并在边缘纤维与芯部纤维之间形成捻度差。第二喷嘴中的气流以与第一喷嘴中的气流相反的方向旋转，以使由第一喷嘴形成的涡旋气球解旋。另一方面，模拟结果很好地支持了由Stalder和Krause提出的纱线形成原理的理论分析。
A realizable k-e turbulence model was adopted to study the airflow characteristics inside the two nozzles including the slotting-tube of Murata air-jet spinning (MJS). Actions of the two nozzles and the accepted principle of yarn formation were both discussed. The results show that some factors in the first nozzle, such as weak opposite swirling balloon in upstream of the jet orifice, vortex breakdown in downstream of the jet orifice and opposite direction airflows between the grooves and the twisting chamber, do good to produce longer wrapper fibers and form twist difference between the edge fibers and the core ones. The airflow in the second nozzle rotates in the opposite direction to that in the first nozzle, to untwist the swirling balloon that formed by the first nozzle. On the other hand, simulation results well supported the theoretical analysis of the principle of the yarn formation proposed by Stalder and Krause.