基于ANSYS CFX的网络喷嘴内部流场计算

Computation of flow patterns inside interlacer jet based on ANSYS CFX

为设计性能优良的用于化纤长丝网络加工的网络器,采用商业计算流体力学软件ANSYS CFX对网络器丝道内的可压缩流体进行模拟,并将模拟结果和以往的实验数据进行比较。结果表明,除了少数几个点外,计算结果和实验结果具有较好的一致性。此外,通过考察丝道纵向截面上的速度矢量的分布,认为丝道纵向截面上对称旋涡的分布有利于网络结的形成;通过考察横向截面上速度矢量分布,认为在较大的张力条件下,网络结不易形成;丝道中心处速度的大小决定了化纤长丝的开松程度。

For efficiently designing high performance interlacer jet which was used for filaments interlacing,this paper simulated compressible airflow inside yarn duct with commercial CFD software ANSYS CFX and then compared the results with the former experimental results.It can be seen that the simulated results has good agreement with the experimental ones except for few points.Furthermore,the distributions of airflow velocity on cross-section of yarn duct show that symmetric eddy help to produce tangling parts,the distributions of airflow velocity on lengthwise-section show that tangling parts are difficult to be produced in higher yarn tension and the radial direction velocity in the vicinity of yarn duct center decides the opening of filaments.