喷气织机辅助喷嘴与异形筘结构参数对流场的影响  

Influence of auxiliary nozzle and profiled reed in air-jet loom on flow field

作　　者：张亮[1] 冯志华[1] 张晓飞[1] 刘帅[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》2016年第9期129-133,144,共6页Journal of Textile Research

摘　　要：为深入理解辅助喷嘴引纬流场特性以及相关结构参数的影响作用,以便为引纬工艺的改善提供参考,根据实际引纬情形建立辅助喷嘴与异形筘组合流场模型。利用计算流体动力学软件Fluent对组合流场进行数值模拟,得到组合流场射流中心线上的速度分布,并通过实验验证数值模拟的合理性。以此为基础,探究异形筘下唇倾角以及辅助喷嘴喷孔与异形筘壁的距离对组合流场的影响。结果表明:辅助喷嘴组合流场出口速度的实验值小于数值模拟值,但二者整体上具有较好的一致性。供气压力为0.3 MPa和0.4 MPa时,异形筘下唇倾角为12°和3°时的气流速度为最优,同时辅助喷嘴喷孔与异形筘壁间的合适距离为9 mm与10 mm。In order to deeply understand the properties of weft insertion flow field of auxiliary nozzle and the effects of correlative structure parameter, and further provide basis for improving the craftwork of weft insertion, the flow field model of a combination of auxiliary nozzle and profiled reed is built according to the actual condition of weft insertion. The numerical simulation is carried out by the computational fluid dynamics software called Fluent. The velocity distribution curve of the combinational flow field centerline is obtained and the rationality of numerical simulation is verified by experiment. On this basis, further research about the effect of the underlip obliquity of profiled reed and the distance between auxiliary nozzle and profiled reed on the combinational flow field is implemented. The results showed that experimental velocity is lower than simulative velocity at the outlet of auxiliary nozzle, but they are in good agreement as a whole. When the air supply pressure is 0.3 MPa and 0.4 MPa, the air velocity performance of 12 degrees and 3 degree of the underlip obliquity is optimal, respectively. Moreover, the suitable distance between auxiliary nozzle and profiled reed is 9 mm or 10 mm.

关 键 词：辅助喷嘴 异形筘 数值模拟 流场 喷气织机 

分 类 号：TS101.2[轻工技术与工程—纺织工程]