| 滴头制造偏差对灌水均匀度及毛管造价的影响 |
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| 引用本文： | 朱德兰,吴普特,王剑. 滴头制造偏差对灌水均匀度及毛管造价的影响[J]. 排灌机械, 2011, 29(2): 175-179. DOI: 10.3969/j.issn.1674-8530.2011.02.017 |
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| 作者姓名： | 朱德兰 吴普特 王剑 |
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| 作者单位： | 1. 西北农林科技大学中国旱地节水农业研究院,陕西杨凌,712100
2. 西北农林科技大学资源环境学院,陕西杨凌,712100 |
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| 基金项目： | 国家863计划项目(2010AA10A302); 高等学校学科引智计划(111-2-16) |
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| 摘 要： | 为了阐明滴头制造偏差系数、灌水均匀度、毛管直径及毛管造价的内在联系,降低滴灌系统造价、提高灌水均匀度,通过理论推导结合实证计算的方法,系统分析了不同均匀度条件下滴头制造偏差系数极限值,以及滴头制造偏差系数、毛管直径、允许均匀度等三者的关系,并推导出毛管造价计算公式.结果表明：对于长度为100 m的毛管,当Keller均匀系数（EEU）为0.80时,制造偏差系数从0.05增大到0.07和0.11时,毛管造价分别增大8.7%和37.1%;当滴头制造偏差系数为0.03,EEU由0.80增大到0.85,0.90和0.95时,毛管直径分别增大20%,23.5%和56.5%,毛管造价也相应增大20%,53.8%和207.7%;当滴头制造偏差系数为0.05,EEU由0.80增大到0.85和0.90时,毛管直径则分别增大19.3%和32.8%,毛管造价也分别增大17.1%和71.4%;对于EEU为0.95时,毛管允许最小流量大于平均流量,管径计算无解.在限定值范围内,滴头制造偏差系数和Keller均匀系数的微小增大将直接导致毛管直径和造价急剧增大;滴灌系统设计应选择制造偏差系数小的滴头及合理的灌水均匀度,以达到降低工程造价的目的.
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| 关 键 词： | 滴头 制造偏差系数 水力流量偏差率 灌水均匀度 毛管造价 |
Effect of emitters manufacturing variation of micro-irrigation on uniformity and lateral cost |
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| Zhu Delan,Wu Pute,Wang Jian. Effect of emitters manufacturing variation of micro-irrigation on uniformity and lateral cost[J]. Drainage and Irrigation Machinery, 2011, 29(2): 175-179. DOI: 10.3969/j.issn.1674-8530.2011.02.017 |
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| Authors: | Zhu Delan Wu Pute Wang Jian |
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| Affiliation: | Zhu Delan1,Wu Pute1,2,Wang Jian1(1.China Arid-area Water-saving Agricultural Institute,Northwest Agriculture and Forestry University,Yangling,Shaanxi 712100,China,2.College of Resources and Environment,China) |
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| Abstract: | In order to find the relationship among the emitter manufacturing variation coefficient,the lateral cost and the lateral diameter,and to decrease the cost of drip irrigation engineering the allowable values of the emitters manufacturing variation coefficient are analyzed for different emission uniformity coefficients(EEU).Then,the relationship among the esmitters manufacturing variation coefficient,lateral diameter,and the EEU is investigated.The function of the lateral cost is also parameterized.An applica... |
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| Keywords: | emitters manufacturing variation coefficient hydraulic flow variation uniformity coefficient pipe cost |
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