| 引用本文: | 陶洪飞,朱玲玲,马英杰,等.滤网孔径对网式过滤器内部流场的影响[J].灌溉排水学报,2017,36(12):. |
| TAO Hongfei,ZHU Lingling,MA Yingjie,et al.滤网孔径对网式过滤器内部流场的影响[J].灌溉排水学报,2017,36(12):. |
|
| 摘要: |
| 为探究典型滤网孔径（0.180、0.150、0.125 mm）对全自动网式过滤器内部流场在过滤时的影响，采用Fluent软件提供的Realizable k-ε模型和多孔阶跃模型模拟其清水流场，讨论和分析不同滤网孔径下的速度场、压强场及能态场。结果表明，滤网孔径为0.180、0.150、0.125 mm的实测水头损失和数值计算的相对误差分别为4.00%、3.52%、7.32%，可知选择的数学模型具有较高的可靠度；滤网孔径越小，网式过滤器过滤时的内部流场越紊乱，水头损失越大，罐体与出水管交界处的滤网需要承受的压强差越大，故实际运行中容易因该处滤网变形甚至破损而需要更换新的滤网。 |
| 关键词: 过滤器； 滤网孔径；数值模拟； 模型； 水头损失 |
| DOI：10.13522/j.cnki.ggps.2017.12.012 |
| 分类号: |
| 基金项目: |
|
| The Effect of Screen Aperture on Internal Flow Field in Automatic Screen Filter |
|
TAO Hongfei, ZHU Lingling, MA Yingjie, HONG Ming, FU Qiuping, ZHAO Jinghua, MA Liang
|
|
College of Water Conservancy and Civil Engineering, Xinjiang Agricultural University, Urumqi 830052, China
|
| Abstract: |
| The flow field of water under different screen apertures in an automatic screen filter was simulated using the k-ε and porous jump models in the Fluent software. Three screen apertures, 0.180, 0.150 and 0.125 mm, were studied. The velocity field, pressure field and energy field under different filter apertures were discussed and analyzed. The results showed that the relative error of the measured and calculated head loss was 4.00, 3.52 and 7.32%, respectively, and the mathematical model was reliable. The smaller the screen aperture was, the more disordered the internal flow field in the automatic screen filter was and the head loss in the automatic screen filter was hence higher. In addition, the screen needed to bear the increased pressure difference between the tank and the outlet pipe at the junction, and needed to be replaced in actual operation due to deformation or even damage. |
| Key words: filter; screen aperture; numerical simulation; model; head loss |
