低能耗喷气涡流纺喷嘴气流场数值模拟与纺纱实验  

Numerical simulation of airflow field in nozzle of vortex spinning with low energy consumption and spinning experimentation

作　　者：奚传智 王家源 王泳智 陈革[1] 裴泽光[1] XI Chuanzhi;WANG Jiayuan;WANG Yongzhi;CHEN Ge;PEI Zeguang(College of Mechanical Engineering,Donghua University,Shanghai 201620,China)

机构地区：[1]东华大学机械工程学院,上海201620

出　　处：《纺织学报》2024年第12期206-214,共9页Journal of Textile Research

基　　金：国家自然科学基金项目(11972116);上海市自然科学基金项目(23ZR1401600);中央高校基本科研业务费专项资金资助项目(2232023Y-01)。

摘　　要：为探究喷嘴气压与喷射孔数量对喷气涡流纺喷嘴能耗与气流机械能特性的影响规律,采用计算流体动力学对喷嘴内气流流动特征进行数值模拟,基于静压特性和机械能特性对喷嘴耗气量和成纱强度进行预测,并与纺纱实验结果进行对比分析。结果表明:随着喷嘴气压的增加,喷嘴内静压值总体呈现降低趋势,而喷射孔出口附近静压值增加,喷嘴内气流机械能随喷嘴气压增加而呈现增大的趋势;随着喷射孔数量的增加,喷嘴内静压值呈现先降低后增加的趋势,而喷射孔出口处静压变化并不显著,加捻腔内气流的机械能呈现先增加后降低的趋势,而锭子与涡流管间环形区域中气流的机械能单调递增。基于数值模拟对耗气量和成纱强度的预测与实验测试结果一致,为揭示参数对喷气涡流纺成纱过程中喷嘴能耗的影响提供有效的方法,为低能耗喷气涡流纺纱喷嘴的设计提供理论参考。Objective Vortex spinning has been developed rapidly in recent years due to its unique advantages.However,the issue of excessive energy consumption of the vortex spinning nozzle is still unresolved.In order to reduce the energy consumption during the vortex spinning process without significantly influence the yarn strength,this study investigates the effect of the nozzle pressure(P)and the number of the injectors(N)on the air consumption of the nozzle and the strength of vortex spun yarn.Method The computational fluid dynamics(CFD)method was adopted to simulate the airflow characteristics inside the nozzle.The air consumption and the yarn tenacity were predicted based on the static pressure and mechanical energy of the airflow.The air flow rate and yarn strength were experimentally measured to verify the numerical results.Result Due to the pressure difference between the nozzle inlet and the vortex chamber,the mechanical energy of the airflow slightly increased in the fiber guiding passage.The mechanical energy of the airflow reached its maximum value in the region around the spindle tip with the influence of the air-jet.Then the mechanical energy of the airflow exhibited a decreasing trend in the annular region between the spindle and the vortex tube along the positive Z-axis.With the increase of nozzle pressure from 0.4 MPa to 0.6 MPa,the static pressure in the vortex chamber and the annular region between the spindle and the vortex tube generally showed a decreasing trend,as the static pressure at the injector exits was increases.The pressure difference between the air reservoir and the injector exits was further increased along with the increase of the nozzle pressure,resulting in the increase of air consumption.The mechanical energy of the airflow in the vortex chamber was slightly increased with the increase of the nozzle pressure,resulting in an increased efficiency of fiber separation.The mechanical energy of the airflow was increased significantly in the annular region between the spindle and the vortex

关 键 词：喷气涡流纺 喷嘴 流场 机械能 耗气量 数值模拟 

分 类 号：TS112.2[轻工技术与工程—纺织材料与纺织品设计]