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Characteristics of intersecting airflows in the narrow flow channel

机译：狭窄流动通道中相交气流的特征

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摘要

Air-jet loom is a kind of shuttleless loom, which is widely used in textile industries. The weft insertion system is composed of main nozzle, auxiliary nozzles, and profiled dent groove. The jets from the main and auxiliary nozzles intersect in the profiled dent groove. The velocity and stability of the intersecting airflows have a direct impact on the yarn's motion. In this paper, the commercial software is adopted to simulate the intersecting airflows in the profiled dent groove. The result shows it is reasonable that the distance from the main nozzle to the first dent is 15 mm. The optimal distance from the main nozzle to the first auxiliary nozzle is between 45 and 50 mm based on the criteria of the utilization efficiency of the airflow. According to the standard of airflow stability, when the spray angle of auxiliary nozzle is about 7 degrees, the standard deviation of the radical airflow velocity is the smallest in different cross sections. Therefore, the intersecting airflows are the most stable when the spray angle of auxiliary nozzle is about 7 degrees. The velocity distribution of intersecting airflows in the profiled dent groove is measured using Particle Image Velocimetry (PIV) technique. The research results can provide some useful references for the optimization of the weft insertion system of the air-jet loom.
机译：喷气织机是一种无梭织机，广泛应用于纺织工业。引纬系统由主喷嘴，辅助喷嘴和异型凹槽组成。来自主喷嘴和辅助喷嘴的射流在异型凹槽中相交。相交气流的速度和稳定性直接影响纱线的运动。在本文中，采用商用软件来模拟异型凹槽中的相交气流。结果表明从主喷嘴到第一个凹坑的距离为15 mm是合理的。基于气流的利用效率的标准，从主喷嘴到第一辅助喷嘴的最佳距离在45mm和50mm之间。根据气流稳定性的标准，当辅助喷嘴的喷射角度约为7度时，基本气流速度的标准偏差在不同的横截面中最小。因此，当辅助喷嘴的喷射角度约为7度时，相交的气流最稳定。使用粒子图像测速（PIV）技术测量异型凹槽中相交气流的速度分布。研究结果可为优化喷气织机的引纬系统提供一些有益的参考。

著录项

  • 来源
    《The Journal of the Textile Institute》 |2018年第4期|517-523|共7页
  • 作者

    Jiang Shunwei; Jin Yuzhen; Hu Xiaodong; Cui Jingyu; Jin Yingzi;

  • 作者单位

    Zhejiang Sci Tech Univ, Zhejiang Prov Key Lab Modern Text Machinery & Tec, Hangzhou, Zhejiang, Peoples R China;

    Zhejiang Sci Tech Univ, Zhejiang Prov Key Lab Modern Text Machinery & Tec, Hangzhou, Zhejiang, Peoples R China;

    Zhejiang Sci Tech Univ, Zhejiang Prov Key Lab Modern Text Machinery & Tec, Hangzhou, Zhejiang, Peoples R China;

    Zhejiang Sci Tech Univ, Zhejiang Prov Key Lab Modern Text Machinery & Tec, Hangzhou, Zhejiang, Peoples R China;

    Zhejiang Sci Tech Univ, Zhejiang Prov Key Lab Modern Text Machinery & Tec, Hangzhou, Zhejiang, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Air-jet loom; profiled dent; nozzle; Particle Image Velocimetry (PIV);

    机译：喷气织机;异型凹痕;喷嘴;颗粒图像测速（PIV）;

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