抽吸孔排列对喷气涡流纺喷嘴流场影响的数值模拟OACSTPCD

In order to investigate the effects of air suction hole arrangement parameters on the process and quality of negative-pressured suction type vortex core-spun yarn formation,a computational fluid dynamics model was established to study the effects of number of columns and axial spacing of suction holes on the airflow characteristics based on numerical simulation.Results was compared and analyzed with those from the spinning experiment.The results showed that the amount of wasted fibers in the spinning process was significantly affected by the axial and radial velocities of the airflow at the inlet plane of the yarn passage of the spindle.The wasted fiber amount was decreased as the increase of the axial and radial velocities of the airflow.The yarn breaking strength was highly dependent on the radial velocity of the airflow through the suction holes in the inlet region of the spindle.Yarn breaking strength was improved as the increase of radial velocity.The wasted fibers were fewer when there were 3 and 4 columns of suction holes than the case with 2 columns,while the yarn breaking strength was the highest when the number of columns was 2.When the axial spacing of suction holes was increased from 1 mm to 2 mm,both the amount of wasted fibers and yarn breaking strength were significantly increased.The numerical simulation results of the influence of suction hole arrangement parameters on wasted fibers during core spun yarn spinning and yarn breaking strength were consistent with previous spinning experiment.A feasible method to reveal the mechanism for the effects of parameters on the vortex yarn formation process and quality was provided.