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| DOI：10.13522/j.cnki.ggps.2017.12.012 |
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| The Effect of Screen Aperture on Internal Flow Field in Automatic Screen Filter |
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TAO Hongfei, ZHU Lingling, MA Yingjie, HONG Ming, FU Qiuping, ZHAO Jinghua, MA Liang
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College of Water Conservancy and Civil Engineering, Xinjiang Agricultural University, Urumqi 830052, China
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| 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 |
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