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Two-Dimensional Simulation of Air Flow in the Transfer Channel of Open-End Rotor Spinning Machines

机译：开式转子纺丝机传输通道内气流的二维模拟

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摘要

A two-dimensional computational fluid dynamics model is developed to simulate the flow patterns inside the transportation zone of a rotor spinning machine and analyze their effects on yarn properties. The strength and area of recirculation at the inlet of the transfer channel caused by the geometric variation and rotating opening roller are significantly related to fluid flow, and consequently to rotor spun yarn properties. Any variation of geometric dimensions of the transfer channel or opening roller velocity affects the air flow pattern, which then alters the configuration of fibers flowing inside the channel. A larger inlet at the transfer channel will lead to a decrease in the inlet mean velocity and will strengthen the primary recirculation zone, which is a potential source for fiber curving and buckling. The ratio of the circumferential velocity of opening roller to mean air flowing velocity is identified as a critical parameter to classify differences in flow patterns. If the ratio is a constant, the flow pattern will not explicitly change, but the drag force will increase with the increase in Reynolds number. Additionally, if the ratio is either too high or too low, the flow is not suitable for maintaining high quality in spun yarns due to the occurrence of strong recirculation at the outer cover side or opening roller side.
机译：建立了二维计算流体动力学模型，以模拟转杯纺纱机运输区内的流型并分析其对纱线性能的影响。由几何形状的变化和打开的旋转罗拉引起的在输送通道入口处的再循环强度和再循环面积与流体流量显着相关，因此与转杯纺纱线的性能显着相关。传输通道的几何尺寸的任何变化或张开辊的速度都会影响气流模式，从而改变通道内流动的纤维的结构。传输通道处较大的入口将导致入口平均速度降低，并会增强主要的再循环区域，这是纤维弯曲和弯曲的潜在来源。将张开辊的圆周速度与平均空气流速之比确定为对流型差异进行分类的关键参数。如果该比率为常数，则流型不会明显改变，但是阻力会随着雷诺数的增加而增加。另外，如果该比率过高或过低，则由于在外覆盖层侧或张开辊侧发生强烈的再循环，因此该流动不适于维持细纱的高质量。

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  • 来源
    《Textile Research Journal》 |1996年第10期|p.641-650|共10页
  • 作者

    L. X. KONG; R. A. PLATFOOT;

  • 作者单位

    School of Mechanical and Manufacturing Engineering, The University of New South Wales, Sydney 2052, Australia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 纺织工业、染整工业;
  • 关键词

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