喷气织机辅助喷嘴结构参数对流场特性的影响  

Influence of structure parameter of auxiliary nozzle in air-jet loom on characteristics of flow field

作　　者：李斯湖 沈敏[1] 白聪 陈亮 LI Sihu;SHEN Min;BAI Cong;CHEN Liang(Hubei Key Laboratory of Digital Textile Equipment,Wuhan Textile University,Wuhan,Hubei 430200,China)

机构地区：[1]武汉纺织大学数字化纺织装备湖北省重点实验室

出　　处：《纺织学报》2019年第11期161-167,共7页Journal of Textile Research

基　　金：国家自然科学基金项目(51505344);湖北省自然科学基金项目(2014CFB766);湖北省数字化纺织装备重点实验室开放课题项目(DTL2018017)

摘　　要：为降低辅助喷嘴能耗,增强辅喷气流的集束性,提高生产效率和织物质量,分析了辅助喷嘴结构参数和供气压力对射流特性的影响。运用流体动力学软件Fluent对不同供气压力下单圆孔、正三角形孔和星形孔3种典型辅助喷嘴结构的三维流场模型进行数值模拟,得到在0.2~0.4 MPa供气压力下3种辅助喷嘴对称面的速度云图、中心轴线速度、耗气量及引纬速度平稳性,提出了评定辅助喷嘴综合性能的方法。并将单圆孔辅助喷嘴数值计算得到的中心线速度和径向速度与实验值进行了比较,验证了数值仿真结果的正确性。结果表明,当供气压力相同时,星形孔辅助喷嘴气流集束性、引纬平稳性最好,耗气量小,综合性能最优。In order to reduce the energy consumption of the auxiliary nozzle,enhance the bundling of the air jet and improve the production efficiency and fabric quality,the influences of structural parameters of the auxiliary nozzle and the supply pressure on the characteristics of flow field were studied.The numerical simulation of three-dimensional flow field model were carried by fluid dynamics software Fluent.Three typical auxiliary nozzle structures under different gas supply pressures were investigated,such as the single circular hole,regular triangular hole and star hole.The velocity contours of the symmetry planes,the central axis speed,the air consumption and the weft insertion stability were acquired under the air supply pressure of 0.2 MPa to 0.4 MPa.The numerical results of the central line velocity and the radial velocity of the single circular hole were verified by experiment.Comparisons between these two results indicate that the overall trend of speed change is consistent with the experimental results.On this basis,the influence of different orifice type auxiliary nozzles on the flow field was explored.The results showed that when the air supply pressure is same,the star-hole auxiliary nozzle has better airflow bundling,better weft insertion stability and less air consumption.

关 键 词：喷气织机 辅助喷嘴 异形筘 数值模拟 星形喷嘴 

分 类 号：TS103.3[轻工技术与工程—纺织工程]