喷气涡流纺喷嘴参数对内流场特性的影响  

Influence of Nozzle Parameters on Internal Flow Field Characteristics of Air-Jet Vortex Spinning

作　　者：梁高翔 王青[1] 吕绪山 党帅 李佐超 LIANG Gaoxiang;WANG Qing;LüXushan;DANG Shuai;LI Zuochao(School of Mechanical and Electrical Engineering,Xi′an Polytechnic University,Xi'an 710048,China)

机构地区：[1]西安工程大学机电工程学院,陕西西安710048

出　　处：《轻工机械》2023年第1期16-22,29,共8页Light Industry Machinery

基　　金：中国纺织工业联合会科技指导性项目(2021019)。

摘　　要：为探究高速气流在喷气涡流纺内流道的流场特性规律,课题组基于FLUENT建立喷嘴的参数化模型,采用单一变量法分别研究喷孔数量、喷孔倾角和供气压力对喷嘴内流场的影响。结果表明:受引导部件的影响,内流场气流特性分别存在不规则性,且有较多的回流和涡流现象的存在;随着喷孔数量的增加,喷孔出口气流速度略有增大,内流场涡流现象减少,气流旋转性能显著增强;随着喷孔倾角的增大,气流速度峰值先增大后减小,导引部件螺旋面两侧的轴向速度和切向速度分布有明显不同,而当喷孔倾角超过70°后角度对速度的影响逐渐减弱;随供气压力的增加,气流速度增大,气流旋转特性增强,纱线加捻效果有所提高。该研究对于喷气涡流纺喷嘴的结构设计具有参考价值。In order to explore the flow field characteristics of high-speed airflow in the flow channel of air-jet vortex spinning, a parametric model of nozzle based on FLUENT was established, and the single variable method was used to study the effects of the number of nozzle holes, nozzle inclination angle and air supply pressure on the flow field in the nozzle. The results show that under the influence of the guiding components, the air flow characteristics in the internal flow field are irregular, and there are more reflux and eddy current phenomena. With the increase of the number of orifices, the airflow velocity at the outlet of the orifice slightly increases, the eddy current phenomenon in the internal flow field decreases, and the airflow rotation performance is significantly enhanced. With the increase of nozzle angle, the peak airflow velocity first increases and then decreases, and the axial velocity and tangential velocity distribution on both sides of the helical surface of the guiding components are obviously different. When the nozzle angle exceeds 70°, the influence of the angle on the velocity gradually weakens. With the increase of air supply pressure, the air flow velocity increases, the air flow rotation characteristics are enhanced, and the yarn twisting effect is improved. The research has reference value for the structure design of air-jet vortex spinning nozzles.

关 键 词：喷气涡流纺 喷嘴 导引针 流场特性 FLUENT 

分 类 号：TS103[轻工技术与工程—纺织工程] TH164[轻工技术与工程—纺织科学与工程]