双槽熔喷工艺中外沿长度对空气流场的影响

用数值方法研究了双槽熔喷工艺中外沿长度对空气流场特征的影响。首先,在双槽熔喷工艺模头的气槽外沿添加2片一定长度的附件,然后用数值方法对添有附件的双槽熔喷工艺的空气流场进行模拟计算;最后,分析了外沿长度对纺丝中心线上的空气速度、压力和温度分布的影响。结果表明,随着外沿长度的增加,空气速度和压力最大值都减小,而空气温度最大值基本不变,速度和压力的衰减程度增加,而温度的衰减程度减小。

Influence of outer length on air flow field in melt blowing with dual slots

The influence of outer length on air flow field in melt blowing with dual slots was studied by numerical simulation. Firstly, two accessories with certain length were added to the outside of dual slots in the melt blowing die. Then, the air flow field of the melt blowing with dual slots added with the accessories was studied by numerical simulation. Finally, the influence of the outer length on the air velocity and pressure and temperature distribution on the spinning center line was anslyzed. The results showed that when the length was increased gradually, the maximum values of air velocity and pressure decreased, but that of the temperature remained unchanged substantially, and the decrease degree of air velocity and pressure increased, but that of air temperature decreased.