| Cite this article: | 杜思琦,黄修桥,李浩,等.手摇清洗网式过滤器内部流场的数值模拟[J].灌溉排水学报,0,():-. |
| DU Siqi,HUANG Xiuqiao,LI Hao,et al.手摇清洗网式过滤器内部流场的数值模拟[J].灌溉排水学报,0,():-. |
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| DOI： |
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| Numerical Simulation Study of the Hand-operated Cleaning Screen Filter |
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DU Siqi, HUANG Xiuqiao, LI Hao, LI Hui, HAN Qibiao
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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
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| Abstract: |
| 【Objective】The internal flow field characteristics of hand-operated cleaning screen filter were discussed.【Method】This paper took the 120 mesh hand-operated cleaning screen filter produced by AZUD company as the research object, the flow characteristics inside the filter were calculated by Flow Simulation of Solidworks, the reliability of the numerical Simulation was verified by comparing the Simulation value of head loss with the measured value of performance tests with tap water, moreover, the velocity field, pressure field and turbulent kinetic energy field of the water flow in the hand-operated cleaning screen filter were analyzed. 【Result】The results showed that the larger the flow rate is, the larger the flow velocity, turbulent kinetic energy are, so the greater the head loss is. The upper part of the screen near the outlet area is the main filtering area, where the water flow velocity is fast, the turbulent flow is severe, the stress is strong, the influence of the nozzle resistance is great. 【Conclusion】The flow rate will affect the value of flow velocity and pressure in a certain area of the filter and its change gradient, but not the flow direction and the change trend. Hence it is suggested that the nozzles on the side near the outlet should be rolled to the bottom of the filter screen to reduce the influence of the nozzle on the hydraulic characteristics of the flow. |
| Key words: micro-irrigation; the hand-operated cleaning screen filter; Numerical simulation |
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