Effect of incident angle of oblique-blowing airflow on yarn in pneumatic tucked-in selvedge apparatus

Abstract

With the increasing requirements of high-speed weaving on looms, more and more shuttleless looms begin to use pneumatic tucked-in selvedge apparatus for tucked-in. In this paper, the oblique-blowing process of yarn under different incident angles is analyzed, the oblique blowing-folding model of airflow and the yarn structure model are established, and the numerical simulation of the oblique blowing-folding flow field of yarn is carried out. The oblique blowing-airflow at different incident angles produces different oblique-blowing processes and pneumatic tucked-in airflow fields, resulting in different deformation and movement of the yarn during the oblique-blowing process, which will also affect the yarn tucked-in process. Therefore, the fluid–structure interaction simulation method is used to analyze the movement of yarn in oblique-blowing and folding-in airflow, and a visual experimental platform is designed to record the state of yarn tucked-in under different oblique-blowing airflow angles by high-speed camera. The research has engineering significance for improving yarn tucked-in quality and tucked-in efficiency, and provides theoretical support for further improving pneumatic tucked-in selvedge apparatus.