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| DOI：10.13522/j.cnki.ggps.2021343 |
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| Numerical Simulation and Experimental Study of Water Flow in Manually-operated Cleaning Screen Filter |
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DU Siqi, HUANG Xiuqiao, LI Hao, LI Shengbao, LI Rui, LI Hui, HAN Qibiao
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1. Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences/Key Laboratory of Water-saving Agriculture of Henan Province/Key Laboratory of Water-saving Irrigation Engineering, Ministry of Agriculture, Xinxiang 453002, China;
2. Graduate School of Chinese Academy of Agricultural Sciences, Beijing 100081, China
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| Abstract: |
| 【Objective】 Manually operated screen filter is a water cleaning device used in irrigation. The purpose of this paper is to propose and validate a numerical model to simulate water flow in the device.【Method】 The 120 mesh hand-operated cleaning screen filter produced by AZUD was used in this study; water flow in the filter was simulated using the Flow Simulation of Solid works. The accuracy of the simulation was verified against measured head loss from the experiment. We also analyzed the velocity field, pressure field and turbulent kinetic energy of water flow in the device. 【Result】 Water flow velocity, turbulent kinetic energy and water head loss all increase with the flow rate. Sediments are filtered mainly in the upper part proximal to the outlet area of the screen, where water flows fast, turbulent flow is severe, stress is strong, and the influence of the nozzle resistance is great.【Conclusion】The flow rate affects water flow velocity and water pressure in a certain area of the filter, but not the flow direction. The nozzles on the side near the outlet should be rolled to the bottom of the filter to reduce their influence on hydraulic characteristics of water flow. |
| Key words: micro-irrigation; the hand-operated cleaning screen filter; numerical simulation |
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