关键词: 转杯, 数值模拟, 纺纱通道, 压力场, 速度场, FLUENT仿真

Abstract: To conduct an in-dept study on the spinning mechanism of self-exhaust rotor spinner, numerical simulation of the flow field of its spinning channel was performed using fluid dynamics technology. A physical model of the single-phase steady-state flow field was constructed based on RNG k-ε turbulence equation using ICEM CFD and FLUENTsoftware. The pressure-velocity coupling simulation results show that, from inlet to outlet of fiber feeding pipeline, the static pressure decreases gradually, while the dynamic pressure increases and the flow velocity in the pipeline is increasingly distributed. The maximum dynamic pressure of 6953 Pa and air velocity of 99.23 m/s at the outlet respectively. Besides, there exists a local pressure field with obvious gradient in the converging area of incoming flow, and the the maximum turbulent velocity at the area is about 93 m/s. The airflow exhibits a relatively large axial velocity and tangential velocity near the condensation tank, which is conducive to slip and condensation of the fiber bundle. The air flow velocity in the exhaust hole is stable, the maximum exhaust velocity of about 33~41 m/s. The airflow supply from the fiber pipeline plays a predominant role in the formation of flow field inside the spinning channel, and a small amount of airflow supplied by the fiber feeding pipeline is mainly used to balance negative pressure in the rotor, which can help explore the fiber feeding and yarn forming process of the self air-exhaust rotor, as well as the airflow field characteristics.

Key words: rotor, numerical simulation, spinning channel, pressure field, velocity field, FLUENT simulation