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.
Yu Liming,Wu Pute,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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迷宫流道偏差量对灌水器水力性能及抗堵塞性能的影响   [下载全文]
Influence of the Offset of Labyrinth Channels of Drip Emitters on Hydraulic and Anti-clogging Performance   [Download Pdf][in English]
  
DOI:10.3969/j.issn.1000-1298.[year].[issue].[sequence]
中文关键词:  灌水器  迷宫流道  水力性能  抗堵塞性能  偏差量
基金项目:国家高技术研究发展计划(863计划)资助项目(2011AA100507)
作者单位
喻黎明 清华大学
长沙理工大学 
吴普特 西北农林科技大学 
牛文全 西北农林科技大学 
中文摘要:以齿尖偏差量分别为-0.25、0、0.25和0.50mm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。
Yu Liming  Wu Pute  Niu Wenquan
Tsinghua University;Changsha University of Science and Technology;Northwest A & F University;Northwest A & F University
Key Words:Emitters, Labyrinth channels, Hydraulic performance, Anti-clogging ability, Offset
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. With the increasing of the offset of emitters, the anti-clogging ability declined. Thus, combining the hydraulic and anti-clogging performance, under the condition of adequate flow state exponent, it put forward a suggestion that reducing the offset as much as possible to enhance the anti-clogging performance.

Transactions of the Chinese Society for Agriculture Machinery (CSAM), in charged of China Association for Science and Technology (CAST), sponsored by CSAM and Chinese Academy of Agricultural Mechanization Science(CAAMS), started publication in 1957. It is the earliest interdisciplinary journal in Chinese which combines agricultural and engineering. It always closely grasps the development direction of agriculture engineering disciplines and the published papers represent the highest academic level of agriculture engineering in China. Currently, nearly 8,000 papers have been already published. There are around 3,000 papers contributed to the journal each year, but only around 600 of them will be accepted. Transactions of CSAM focuses on a wide range of agricultural machinery, irrigation, electronics, robotics, agro-products engineering, biological energy, agricultural structures and environment and more. Subjects in Transactions of the CSAM have been embodied by many internationally well-known index systems, such as: EI Compendex, CA, CSA, etc.

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