喷气涡流纺中纤维运动的三维数值模拟
|
摘要
针对目前模拟纤维在喷气涡流纺喷嘴流场中运动情况,常将纤维模型简化或者建立二维模型,无法描述纤维在三维空间内的变形这个问题,建立了纤维运动三维模型,并合理设置纤维属性,使纤维运动模型更加符合实际状态。结合任意拉格朗日-欧拉法,数值模拟求解了纤维在喷气涡流纺喷嘴流场中的运动问题,并分析了纤维的运动与变形情况。结果表明:加捻室的负压导致喷嘴入口的气流流动,纤维尾端在气流中的运动十分复杂,先在乱流的影响下小幅波动,然后随时间推进振动频率和振动幅度都是先增大后减小;在流场的影响下,纤维尾端从纱线中被剥离出来,并呈螺旋形式向前行进形成包缠纤维。
The simplification of the fiber model or establishment of a two-dimensional model to simulate the movement of fibers in the flow field of murata vortex spinning nozzle could not describe the deformation of fibers in three-dimensional space. In order to solve this problem, a three-dimensional model of fibers was established, and the properties of fibers were reasonably set to make the model more accurate. Combining with arbitrary Lagrangian-Eulerian method, the motion of fiber in the flow field inside the jet vortex spinning nozzle was solved under the condition of fluid-structure interaction, and the movement and deformation of the fiber in the flow field were obtained. The results shown that the negative pressure in the twisting chamber causes the air flow at the nozzle inlet. The movement of the fiber tail in the gas stream is quite complex, first under the influence of turbulence, small fluctuations occur. Then, as time advances, the vibration frequency and vibration amplitude both increase first and then decrease. Under the influence of the flow field, the fiber tail is peeled off from the yarn and spirals forward to form the wrapping fiber.
The simplification of the fiber model or establishment of a two-dimensional model to simulate the movement of fibers in the flow field of murata vortex spinning nozzle could not describe the deformation of fibers in three-dimensional space. In order to solve this problem, a three-dimensional model of fibers was established, and the properties of fibers were reasonably set to make the model more accurate. Combining with arbitrary Lagrangian-Eulerian method, the motion of fiber in the flow field inside the jet vortex spinning nozzle was solved under the condition of fluid-structure interaction, and the movement and deformation of the fiber in the flow field were obtained. The results shown that the negative pressure in the twisting chamber causes the air flow at the nozzle inlet. The movement of the fiber tail in the gas stream is quite complex, first under the influence of turbulence, small fluctuations occur. Then, as time advances, the vibration frequency and vibration amplitude both increase first and then decrease. Under the influence of the flow field, the fiber tail is peeled off from the yarn and spirals forward to form the wrapping fiber.
引文
[1] GULDEMET B,WILLIAM O.Spun yarn vs.air-jet spun yarn [J].AUTEX Research Journal,2003,3(3):96-101.
[2] ZOU Z,CHENG L,XI B,et al.Investigation of fiber trajectory affected by some parameter variables in vortex spun yarn[J].Textile Research Journal,2015,85(2):180-187.
[3] LI Meiling,YU Chongwen,SHANG Shanshan.Effect of the distance between guided needle and cone body on properties of vortex spun yarn[J].Advanced Materials Research,2014,104(8):575-578.
[4] LI Meiling.Effect of the distance between jet orifice and nozzle Alex on properties of vortex spun yarn[J].Journal of the Textile Institute,2016,107(1):81-90.
[5] LI Meiling,YU Chongwen,SHANG Shanshan.Effect of vortex tube structure on yarn quality in vortex spinning machine[J].Fibers and Polymers,2014,15(8):1786-1791.
[6] ZOU Zhuanyong,LIU Shirui,ZHENG Shaoming,et al.Numerical computation of a flow field affected by the process parameters of murata vortex spinning[J].Fibres & Textile in Eastern Europe,2010,18(2):35-39.
[7] CHIBA K,KOMATSU T.Numerical simulation for orientation of thin disk particles in a newtonian flow through a L-shape channel[J].Journal of Textile Engineering,2007,53(53):31-35.
[8] LIN J Z,GAO Z Y,ZHOU K,et al.Mathematical modeling of turbulent fiber suspension and successive iteration solution in the channel flow[J].Applied Mathematical Modelling,2006,30(9):1010-1020.
[9] ZENG Y C,YU C W.Mixed euler-lagrange approach to modeling fiber motion in high speed air flow[J].Applied Mathematical Modelling,2005,29(3):253-261.
[10] PEI Zeguang,YU Chongwen.Investigation on the dynamic behavior of the fiber in the vortex spinning nozzle and effects of some nozzle structure para-meters [J].Textile Research Journal,2014,85(2):180-187.
[11] 裴泽光,郁崇文.喷气涡流纺中纤维运动的数值模拟[J].东华大学学报(自然科学版),2010,36(6):615-621.PEI Zeguang,YU Chongwen.Numerical simulation of fiber motion in jet swirl spinning[J].Journal of Donghua University(Natural Science Edition),2010,36(6):615-621.
[12] 郭会芬.喷气纺纱喷嘴内三维旋转气流场及柔性纤维运动的研究[D].上海:东华大学,2009:10-15.GUO Huifen.Study on three-dimensional swirling airflow and motion of flexible fiber in air-jet spinning nozzle[D].Shanghai:Donghua University,2009:10-15.
[13] SADYKAVA F K.The poisson′s ratio of textile fibers and yarns[J].Fiber Chemistry,1972,3(2):180-183.
[2] ZOU Z,CHENG L,XI B,et al.Investigation of fiber trajectory affected by some parameter variables in vortex spun yarn[J].Textile Research Journal,2015,85(2):180-187.
[3] LI Meiling,YU Chongwen,SHANG Shanshan.Effect of the distance between guided needle and cone body on properties of vortex spun yarn[J].Advanced Materials Research,2014,104(8):575-578.
[4] LI Meiling.Effect of the distance between jet orifice and nozzle Alex on properties of vortex spun yarn[J].Journal of the Textile Institute,2016,107(1):81-90.
[5] LI Meiling,YU Chongwen,SHANG Shanshan.Effect of vortex tube structure on yarn quality in vortex spinning machine[J].Fibers and Polymers,2014,15(8):1786-1791.
[6] ZOU Zhuanyong,LIU Shirui,ZHENG Shaoming,et al.Numerical computation of a flow field affected by the process parameters of murata vortex spinning[J].Fibres & Textile in Eastern Europe,2010,18(2):35-39.
[7] CHIBA K,KOMATSU T.Numerical simulation for orientation of thin disk particles in a newtonian flow through a L-shape channel[J].Journal of Textile Engineering,2007,53(53):31-35.
[8] LIN J Z,GAO Z Y,ZHOU K,et al.Mathematical modeling of turbulent fiber suspension and successive iteration solution in the channel flow[J].Applied Mathematical Modelling,2006,30(9):1010-1020.
[9] ZENG Y C,YU C W.Mixed euler-lagrange approach to modeling fiber motion in high speed air flow[J].Applied Mathematical Modelling,2005,29(3):253-261.
[10] PEI Zeguang,YU Chongwen.Investigation on the dynamic behavior of the fiber in the vortex spinning nozzle and effects of some nozzle structure para-meters [J].Textile Research Journal,2014,85(2):180-187.
[11] 裴泽光,郁崇文.喷气涡流纺中纤维运动的数值模拟[J].东华大学学报(自然科学版),2010,36(6):615-621.PEI Zeguang,YU Chongwen.Numerical simulation of fiber motion in jet swirl spinning[J].Journal of Donghua University(Natural Science Edition),2010,36(6):615-621.
[12] 郭会芬.喷气纺纱喷嘴内三维旋转气流场及柔性纤维运动的研究[D].上海:东华大学,2009:10-15.GUO Huifen.Study on three-dimensional swirling airflow and motion of flexible fiber in air-jet spinning nozzle[D].Shanghai:Donghua University,2009:10-15.
[13] SADYKAVA F K.The poisson′s ratio of textile fibers and yarns[J].Fiber Chemistry,1972,3(2):180-183.