Abstract: In order to further optimize the inside structure of cyclone and improve the quality of yarn, this paper designed three cyclones with different airway position, and processed the ring spun yarn under pressure 0-0.25MPa. The performance index of yarn hairiness was tested, and the effects of airway position on yarn hairiness were conducted for comparison with the traditional ring spinning. The results showed that the yarn hairiness was lowest when the airway diameter was 1.4mm, airway position was 1:2 and the processing pressure was 0.2MPa. Moreover, we simulated and analyzed the airflow inside nozzle by computational fluid dynamics software ANSYS CFX, and discussed the effect mechanism of airflow on yarn hairiness reduction, and further clarified the effects of airway position, air pressure on the airflow inside nozzle.

Key words: airway position, ring spinning, cyclone, numerical simulation, spun yarn , hairiness