| 迷宫流道转角对灌水器水力性能的影 |
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| 引用本文： | 喻黎明,吴普特,牛文全,范兴科,张林.迷宫流道转角对灌水器水力性能的影[J].农业机械学报,2009,40(2):63-67. |
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| 作者姓名： | 喻黎明 吴普特 牛文全 范兴科 张林 |
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| 作者单位： | 1. 西北农林科技大学水利与建筑工程学院,陕西杨凌,712100
2. 中国科学院水利部水土保持研究所国家节水灌溉杨凌工程技术研究中心,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) |
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| 摘 要： | 为研究齿形、梯形以及矩形流道转角变化对水力性能的影响,采用Fluent软件对不同形状下不同转角的流道进行了数值模拟.研究结果表明:当其他条件相同时,转角的变化与流量系数、流态指数呈负相关,其变化对梯形流道灌水器的流量系数影响最大,最多下降了19.03%,齿形流道次之,下降了10.14%,矩形流道是梯形流道转角角度增加的延伸,具有相同的水力性能变化规律;随着角度的增加,梯形流道总的局部水头损失系数最多增加了32.5%,而齿形流道总的局部水头损失系数最多增加了23.4%,变化都很明显;压力较高时,摩阻系数基本保持不变,流体为紊流状态.
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| 关 键 词： | 滴灌 灌水器 迷宫流道 转角 水力性能 |
of Angle of Labyrinth Channels on Hydraulic Performance of Emitter |
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| Yu Liming,Wu Pute,Niu Wenquan,Fan Xingke,Zhang Lin.of Angle of Labyrinth Channels on Hydraulic Performance of Emitter[J].Transactions of the Chinese Society of Agricultural Machinery,2009,40(2):63-67. |
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| Authors: | Yu Liming Wu Pute Niu Wenquan Fan Xingke Zhang Lin |
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| Institution: | 1.College of Water Resource and Architectural Engineering;Northwest A&F University;Yangling;Shaanxi 712100;China 2.National Engineering Research Center for Water Saving Irrigation at Yangling;Institute of Soil and Water Conservation;Chinese Academy of Sciences;China |
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| Abstract: | To analyze the influence of angle of labyrinth channels to the hydraulic performance of emitter,Fluent 6.2 CFD software was used to study the sawtooth,trapezoid and rectangle channels with the different angles.The results showed negative relationship between angle and discharge coefficient and flow state exponent when the other conditions did not change.With the increasing of angle the discharge coefficient of trapezoid labyrinth channels decreased by 19.03 percent,the hydraulic performance of rectangle lab... |
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| Keywords: | Drip irrigation Emitter Labyrinth channels Angle Hydraulic performance |
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