基于ADINA流固耦合的纤维在涡流场中的运动研究

Study on Motion of Fiber in Vortex Flow Field Based on ADINA Fluid Structure Interaction

为了研究纤维在喷气涡流纺喷嘴中的运动状况,以MVS861型喷气涡流纺喷嘴为原型建立二维计算模型,运用有限元计算软件ADINA中的流固耦合计算模块对纤维-气流两相耦合进行数值分析,同时研究喷孔处的压力大小对两相流运动的影响。结果表明:气流经两侧喷孔喷出后,在流场内会产生涡流场推动内部纤维以波浪式运动向喷嘴出口推进;随着喷孔处的压力增大,纤维的运动周期变短、摆动频率变高;增大喷孔处的压力能够提高纤维加捻包缠的工作效率。

To study the fiber movement in air jet vortex spinning,the 2 D computational model based on MVS861 air jet vortex spinning was developed; By using the fluid-solid interaction calculation module in the finite element calculation software ADINA,analysis result of the fiber air two-phase interaction was obtained,in the meanwhile,the influence of the pressure at the nozzle hole on the two-phase flow was studied. Simulation results show that air is ejected from the jet orifice,the vortex field is generated in the flow field and the internal fiber is pushed in a wave motion toward the nozzle exit. With the increase of the pressure at the nozzle,the fiber＇s period of movement becomes shorter and the frequency of fiber＇s oscillation frequency increases. Increasing the pressure at the nozzle hole can improve the work efficiency of twisting and wrapping of the fiber.