转杯纺分梳排杂区气流场的多维数值模拟对比  

Comparison on multi-dimensional numerical simulation of airflow field in carding and trash removal zone for rotor spinning

作　　者：张定眺 王倩茹 邱芳 李凤艳[1,3] ZHANG Dingtiao;WANG Qianru;QIU Fang;LI Fengyan(School of Textile Science and Engineering,Tiangong University,Tianjin 300387,China;United Testing Services(Jiangsu)Co.,Ltd.,Suzhou,Jiangsu 215228,China;Key Laboratory of Advanced Textile Composite Materials of Ministry of Education,Tiangong University,Tianjin 300387,China)

机构地区：[1]天津工业大学纺织科学与工程学院,天津300387 [2]江苏中纺联检验技术服务有限公司,江苏苏州215228 [3]天津工业大学先进纺织复合材料教育部重点实验室,天津300387

出　　处：《纺织学报》2024年第10期64-71,共8页Journal of Textile Research

摘　　要：为探讨转杯纺分梳排杂区二维与三维模型气流场数值模拟结果的准确度与差异性,采用COMSOL仿真模拟软件建立分梳排杂区的二维与三维几何模型,对气流场进行数值模拟并进行比较。结果表明:与二维模型模拟结果相比,三维模型输纤通道出口处速度高,分梳腔速度、压强与湍动能分布更均匀,且排杂区的气流与湍动能分布结果更加准确;引入杂质颗粒后的运动结果也证明,三维模型中大部分杂质颗粒随气流运动及时排除,仅有少部分杂质进入输纤通道内,对流场细节和颗粒分布情况的模拟展现得更加准确直观,适合指导实际生产与优化转杯纺机构的设计。Objective Rotor spinning belongs to airflow spinning,the airflow in each spinning machine affects the movement of the fiber.The study and comparison of the accuracy and difference of the airflow field can provide reference for the improvement of the spinning mechanism,so as to improve the yarn quality.To investigate the accuracy and differences of airflow field produced in combing and trash removal zone of rotor spinning simulated by two-dimensional(2-D)and three-dimensional(3-D)model,the numerical simulation results of 3-D model is compared to that of 2-D model.It is expected to express the suitable application of numerical simulation in guidance of structure and parameters modification in rotor spinning.Method COMSOL simulation software was used to build the 2-D and 3-D geometric models of the combing and trash removal area.The model included combing chamber,sliver entrance,debris removal area and fiber transport channel.ModelⅠwas a 2-D model,and ModelⅡandⅢwere 3-D models with different wedge shape of fiber transport channel.The"frozen rotor"in COMSOL multiphysics simulation was a special"steady-state"study dedicated to calculation of the velocity,pressure,and turbulence fields of flow in rotating machinery.The rotation was analyzed by introducing centrifugal forces.Results The numerical simulation results of 2-D and 3-D models were similar in general,but differed in some results.The velocity at the exit of the fiber transport channel of 3-D model was higher than that of 2-D model,therefore,velocity distribution of 3-D model indicated a better improvement of fiber straightness.The energy of the turbulent flow in the 2-D model was basically below 10 J.The airflow is relatively stable,and only two large turbulent flow were generated near the entrance wall.In Model II,the turbulent flow was floated at the air filler due to a vortex,but it gradually became smaller as the cross section of the fiber transport channel got smaller,and the airflow was slowly stablized.The airflow stability in ModelⅢwas obviously

关 键 词：转杯纺 分梳排杂 数值模拟 气流场 三维模型 二维模型 

分 类 号：TS103.2[轻工技术与工程—纺织工程]