| 泥沙级配对迷宫流道滴头堵塞及 毛管内泥沙沉积的影响 |
| 吴泽广1,2; 牛文全1,2
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| 2014
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发表期刊 | 西北农林科技大学学报(自然科学版)
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卷号 | 42期号:5页码:223-228 |
摘要 | 【目的】设计对不同泥沙级配的浑水进行滴灌试验,为泥沙机械组成对滴头堵塞的影响过程研究提
供理论参考。【方法】采用短周期法,设计了粒径小于0.1mm的3种不同级配泥沙(编号分别为A、B、C,其<0.03
mm,≥0.03~≤0.05mm,>0.05~≤0.1mm 粒径泥沙所占比例分别为58.38%,27.17%,14.45%;48.50%,
13.20%,38.30%;20.13%,23.55%,56.32%)及3种不同含沙量(0.5,1.0,1.5g/L)组合的滴头抗堵塞试验,分析了
毛管中沉积泥沙的位置与粒径组成及滴头流量与含沙量的变化。【结果】当含沙量不大于1.0g/L时,泥沙级配C最
易造成滴头堵塞,而级配B次之,级配A最不易造成滴头堵塞;当含沙量大于1.0g/L时,泥沙级配对堵塞的影响有
所降低。当毛管上的滴头发生严重堵塞时,毛管内的淤积泥沙主要分布在毛管中段0.6~1.0m处,未发生堵塞或者
发生非常轻微堵塞的毛管泥沙淤积主要分布在毛管尾端。粒径>0.05~≤0.1mm的泥沙最易沉积在毛管内,而小
于0.03mm的泥沙颗粒最易随水流排出滴头。【结论】泥沙级配是影响滴头堵塞的主要因素,当大于0.05mm的泥
沙颗粒含量较高时,非常易造成滴头堵塞,泥沙级配对其在毛管中的淤积位置影响较小,但对泥沙淤积量有一定的影响。 |
其他摘要 | 【Objective】This paper conducted drip-irrigation tests using muddy water with different sediment
compositions to investigate the effects of sediment compositions on emitter clogging.【Method】Combinations
of three sediment compositions(A:ratios of particles with diameters of<0.03mm,≥0.03-
≤0.05mm,and>0.05-≤0.1mm were 58.38%,27.17%,and 14.45%;B:ratios of particles with diameters
of<0.03mm,≥0.03-≤0.05mm,and>0.05-≤0.1mm were 48.50%,13.20%,and 38.30%;C:
ratios of particles with diameters of<0.03mm,≥0.03-≤0.05mm,and >0.05-≤0.1mm were
20.13%,23.55%,and 56.32%)and three sand levels(0.5,1.0,and 1.5g/L)were tested based on shortperiod
repeatability method for anti-clogging experiments.The location of alluvial sediments,size compositions,
sediment concentrations and flow changes were analyzed.【Result】When the sediment concentrationwas≤1.0g/L,C was the easiest to cause clogging,followed by B and A.When the sediment concentration
was>1.0g/L,influence of sediment composition on clogging decreased.Sediment deposition appeared in
the middle section 0.6-1.0mof emitting-pip when clogging happened,while sediment deposition appeared
in the tail when there was no or slight clogging.The sediment particles with size of>0.05-≤0.1mm
easily deposited in the emitter-pips,while particles with size of<0.03mm could be discharged from the emitters
easily.【Conclusion】Sediment composition was the main factor of emitter clogging.When the size
of particles was>0.05mm,it easily caused clogging.Sediment composition had small effect on the location
of sediment siltation,but had certain influence on sedimentation volume. |
关键词 | 滴灌系统
迷宫流道
泥沙级配
含沙量
滴头堵塞
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收录类别 | 中文核心期刊要目总览
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语种 | 中文
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文献类型 | 期刊论文
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条目标识符 | sbir.nwafu.edu.cn/handle/361005/9795
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专题 | 水保所知识产出(1956---)
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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 2.中国科学院/水利部水土保持研究所
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推荐引用方式 GB/T 7714 |
吴泽广,牛文全. 泥沙级配对迷宫流道滴头堵塞及 毛管内泥沙沉积的影响[J]. 西北农林科技大学学报(自然科学版),2014,42(5):223-228.
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APA |
吴泽广,&牛文全.(2014).泥沙级配对迷宫流道滴头堵塞及 毛管内泥沙沉积的影响.西北农林科技大学学报(自然科学版),42(5),223-228.
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MLA |
吴泽广,et al."泥沙级配对迷宫流道滴头堵塞及 毛管内泥沙沉积的影响".西北农林科技大学学报(自然科学版) 42.5(2014):223-228.
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泥沙级配对迷宫流道滴头堵塞及毛管内泥沙沉积的影响_吴泽广.pdf
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