应用STAR-CCM+的旋流喷嘴内部三维流场数值模拟与分析

Numerical simulation and analysis of three dimensional flow field inside swirl nozzle based on STAR-CCM

为探讨旋流喷嘴内部气流流动特征对纱线表面的作用效果,采用软件STAR-CCM+建立流体计算模型,对喷嘴内部气流流动进行数值模拟和计算。根据计算结果,解析和比较喷嘴气道与纱道相交方向和相切点位置不同时,喷嘴纱道中径向、切向、轴向气流的速度分布规律,并结合纱道中气流分布特点,分析气流对纱线的作用效果。从模拟结果得出:旋流喷嘴纱道与气道相切点沿X轴负方向长度为14 mm,且喷嘴气道与纱道相交方向向上时,所形成的气流对减少占大多数的顺向毛羽较为有利。

To investigate the effect of air flow characteristic inside the swirl nozzle on the yarn surface,STAR-CCM ＋ software was adopted to establish a fluid calculation model,and the air flow inside the swirl nozzle was numerically simulated and calculated.According to the calculation results,when the cross directions and tangent point positions of the nozzle airway and the yarn path were different,the velocity distribution rules of radial,tangential and axial air flows in the nozzle airway were analyzed and compared,and the action effect of airflow on yarns was analyzed in combination with the distribution characteristic of airflow in the yarn path.It was drawn from the simulation results that the tangency point of the yarn path and airway of the swirl nozzle along the X axis negative direction had a length of 14 mm,and when the cross direction of the nozzle airway and the yarn way are upwards,and the formed airflow is more conductive to the reduction of the majority of forward hairs.