含纱疵纱线的气流引纬牵引特性分析  

Analysis on airflow drag characteristics of yarn with yarn faults

作　　者：张荣[1] 冯志华[1] 陆庆[1] 陈晓明[1] 

机构地区：[1]苏州大学机电工程学院,江苏苏州215021

出　　处：《纺织学报》2017年第11期131-136,共6页Journal of Textile Research

摘　　要：为探究纱疵对气流牵引纱线的影响,根据纱疵在流体中的形状特性,提出以球体或圆柱体模型化短粗节纱疵的新设想。基于Fluent的流场分析结果,对短粗节纱疵牵引力进行了数值计算。通过自行设计的主喷嘴气流引纬牵引力测试装置,测定了短粗节纱疵模型球体在0.3 MPa供气压力下的气流牵引力大小,并对前述数值计算结果的合理性进行了验证,得到较好的一致性。同时,探究了纱疵对纱线牵引力系数的影响效应。结果表明:随着纱疵直径增大,纱线牵引力系数的变化率呈现先上升随后逐渐趋于平缓的现象;而随着纱疵数量的增多,牵引力系数的变化率呈逐次下降态势。In order to study the influence of yarn faults on airflow drags yarn,an assumption simulating short slub yarn faults by spheres and cylinders was proposed firstly according to the shape feature of yarn faults in airflow. The drag force of short slub yarn faults were numerically calculated based on analysis on airflow results by Fluent. The drag forces of spheres as model of short slub yarn faults were tested by selfdesigned testing drag force device for main-nozzle air-jet weft insertion under 0. 3 MPa inlet pressure. The rationality of numerical calculation of previous statement was verified,and the consistency was obtained.Finally,the influence of short slub yarn faults on drag coefficient was studied. It is found that the change rate for coefficient of drag force increases firstly then verges to stabilization gradually with the diameter of yarn faults increasing. In addition,the change rate for coefficient of drag force presents descending tendency gradually with increase of the quantity of yarn faults.

关 键 词：纱线 纱疵 气流牵引 数值计算 牵引力系数 

分 类 号：TS101.2[轻工技术与工程—纺织工程]