| 引用本文: | 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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| 摘要: |
| 【目的】探讨手摇清洗网式过滤器内部流场特性。【方法】以AZUD公司生产的120目手摇清洗网式过滤器为研究对象，借助Solidworks流体分析模块Flow Simulation模拟过滤器内部流动特征，通过不同流量下的能量性能试验验证了数值模拟的可靠性，分析了手摇清洗网式过滤器内部水流的速度场、压强场和湍动能场，探讨了手摇清洗网式过滤器内部结构对水流特性的影响。【结果】流量越大，过滤器内部流速、湍动能等越大，水头损失越大，这与对比试验结论一致。滤网靠近出水口区域的上半部分是主要的过滤区域，该区域受吸嘴的阻力影响，水流速度快、湍流剧烈、受力大。【结论】流量影响过滤器内部水流流速和压强的大小及其变化梯度，但不影响水流方向及流速和压强的变化趋势。过滤时，将靠近出水口一侧的最后一个吸嘴摇至滤网最下部，使得该侧的吸嘴整体位置靠下，可减少吸嘴对水流水力特性的影响。 |
| 关键词: 微灌；手摇清洗网式过滤器；数值模拟 |
| DOI： |
| 分类号:S275.6 |
| 基金项目:中国农业科学院农业科技创新工程项目（ASTIP202102）；河南省科技攻关项目（202102110279，202102110277）；中国农业科学院基本科研业务费专项院级统筹项目（Y2021YJ07，Y2022XK12） |
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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 |
