排灌机械工程学报
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排灌机械工程学报  2010, Vol. 28 Issue (1): 59-62    DOI: 10.3969/j.issn.1674—8530.2010.01.013
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自压滴灌支管灌水单元设计方法
朱德兰1, 吴普特1,2, 李岚斌1, 张 琛1, 王 剑1
(1.西北农林科技大学 资源环境学院, 陕西 杨凌 712100; 2.西北农林科技大学 国家节水灌溉杨凌工程中心, 陕西 杨凌 712100)
Gravity-fed manifold subunit hydraulic design
Zhu Delan1, Wu Pute1,2, Li Lanbin1, Zhang Chen1, Wang Jian1
(1.College of Resources and Environment,Northwest Agriculture and Forestry University, Yangling, Shaanxi 712100, China; 2.National Engineering Center for Irrigation Water Savings,Northwest Agriculture and Forestry University, Yangling, Shaanxi 712100, China)
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摘要 摘 要: 为了解决山地自压滴灌支管灌水单元水力设计问题,以滴头制造偏差、水力偏差和微地形偏差产生的综合流量偏差率作为灌水均匀度衡量标准,计算出支管灌水单元不同压力区允许水压力偏差和最大水压力,根据不同压力区支管水压力递推关系,确定出支管压力偏差分配系数,将支管单元设计转变为支管设计和毛管设计;支管设计采用两阶段设计法,计算出支管各节点水压力,根据该水压力和不同压力区允许最大水压力,对支管进行压力单元的划分,在不同压力区选择不同类型的滴头,使滴头额定工作压力与地形高差提供的工作压力相匹配.研究结果可直接用于山地支管灌水单元设计,计算可在Excel表格中完成,设计方法简单实用.
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朱德兰
吴普特
李岚斌
张 琛
王 剑
关键词 自压滴灌       压力分区   支管灌水单元   压力偏差分配系数   综合流量偏差率     
Abstract: In order to find design method of gravity-fed manifold subunit, the emitters discharge variation rate caused by hydraulic variation, emitter manufacturing variation and micro-topography variation were used as the criteria of irrigation uniformity. Then, the emitter discharge variation rate caused by hydraulic factor, the pressure head variation, and the maximum pressure head for different pressure sections were determined. By analyzing water pressure head relationship of different pressure units, the distribution coefficient of manifold pressure head variation for different pressure area was calculated, and the manifold subunit design was divided into independent processes for laterals and manifold. In the manifold design, a two-stage optimal design method was used. The size of each of the pressure sections was determined according to the pressure head distribution along the manifold. The different emitter types were chosen according to the nominal design pressure which best matches the available pressure at the entrance of each lateral. The design procedure can be applied in a spreadsheet application on a personal computer.
Key wordsgravity-fed drip irrigation   pressure sections   manifold subunit   distribution coefficient of manifold pressure head variation   emitters combined discharge variation rate   
收稿日期: 2009-09-09; 出版日期: 2010-01-30
基金资助:

国家863计划项目(2010AA10A302);国家科技支撑项目(2007BAD88B05);国家111计划项目(111-2-16)

通讯作者: 朱德兰(1969-),女,陕西杨凌人,教授,博士(dlzhu@126.com),主要从事水资源高效利用研究.    
作者简介: 吴普特(1963-),男,陕西杨凌人,教授,博士(gjzwpt@vip.sina.com),主要从事水资源高效利用研究.
引用本文:   
朱德兰,吴普特,李岚斌等. 自压滴灌支管灌水单元设计方法[J]. 排灌机械工程学报, 2010, 28(1): 59-62.
ZHU De-Lan,WU Pu-Te,LI Lan-Bin et al. Gravity-fed manifold subunit hydraulic design[J]. Journal of Drainage and Irrigation Machinery Engin, 2010, 28(1): 59-62.
 
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