| 迷宫流道偏差量对灌水器水力性能及抗堵塞性能的影响 |
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| 引用本文： | 喻黎明,吴普特,牛文全. 迷宫流道偏差量对灌水器水力性能及抗堵塞性能的影响[J]. 农业机械学报, 2011, 42(9): 64-68,73 |
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| 作者姓名： | 喻黎明 吴普特 牛文全 |
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| 作者单位： | 1. 清华大学水利系,北京100084;长沙理工大学水利工程学院,长沙410114
2. 西北农林科技大学水利与建筑工程学院,陕西杨凌,712100 |
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| 基金项目： | 国家高技术研究发展计划（863计划）资助项目（2011AA100507） |
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| 摘 要： | 以齿尖偏差量分别为-0.25、0、0.25和0.50 mm的齿形流道结构形式的灌水器为研究对象,应用CFD单相流流场速度数值分析、CFD两相流沙粒浓度分布数值分析、试验样品清水和浑水测试相结合的方法,研究了偏差量对灌水器水力性能和抗堵塞能力的影响.结果表明:偏差量与流态指数呈正相关关系,与流量系数呈负相关关系,而随着偏差量的增加灌水器的抗堵塞能力也在下降,综合分析偏差量对水力性能和抗堵塞性能的影响,认为在满足流态指数的要求下应尽量减小偏差量以提高抗堵塞能力.
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| 关 键 词： | 灌水器 迷宫流道 水力性能 抗堵塞性能 偏差量 |
Influence of the Offset of Labyrinth Channels of Drip Emitters on Hydraulic and Anti-clogging Performance |
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| Yu Liming,Wu Pute and Niu Wenquan. Influence of the Offset of Labyrinth Channels of Drip Emitters on Hydraulic and Anti-clogging Performance[J]. Transactions of the Chinese Society for Agricultural Machinery, 2011, 42(9): 64-68,73 |
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| Authors: | Yu Liming Wu Pute Niu Wenquan |
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| Affiliation: | Yu Liming1,2Wu Pute3Niu Wenquan3 (1.Department of Hydraulic Engineering,Tsinghua University,Beijing 100084,China 2.School of Hydraulic Engineering,Changsha University of Science and Technology,Changsha 410114,China 3.College of Water Resource and Architectural Engineering,Northwest A & F University,Yangling,Shaanxi 712100,China) |
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| Abstract: | The influence of offsets(-0.25mm,0,0.25mm,0.50mm) of dental labyrinth channels of drip emitters on hydraulic and anti-clogging performance was studied by the following methods: there were numerical simulations carried out for the liquid-phase flow and the liquid-solid two-phase flows in the flow field by the CFD program Fluent,and the samples were tested.The obtained results showed positive relationship between offset and discharge coefficient,and negative relationship between offset and flow state exponent... |
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| Keywords: | Emitters Labyrinth channels Hydraulic performance Anti-clogging ability Offset |
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