| 浑水低压管道输水灌溉的试验 |
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| 引用本文： | 何武全,王玉宝,张英普,蔡明科.浑水低压管道输水灌溉的试验[J].沈阳农业大学学报,2007,38(1):98-101. |
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| 作者姓名： | 何武全 王玉宝 张英普 蔡明科 |
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| 作者单位： | 西北农林科技大学,水利与建筑工程学院,陕西,杨凌,712100 |
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| 摘 要： | 浑水低压管道输水灌溉工程设计中,由于缺乏相关计算依据,其临界不淤流速多借用有关管道输送的临界不淤流速公式计算确定,管道阻力损失计算一般直接利用清水管道计算公式,因此其计算误差较大,适用性和可靠性差。针对管道输水灌溉的特点,给出了浑水低压管道输水灌溉的临界不淤流速的定义,进行了不同含沙量下管道临界不淤流速和阻力损失试验。结果表明:含沙量对临界不淤流速有明显的影响,当管径和泥沙容重一定时,临界不淤流速随着浑水含沙量增大而增大;浑水阻力损失随着流速和含沙量的增大而增大。同时,整理分析试验数据,得出了浑水低压管道输水灌溉临界不淤流速和阻力损失经验计算公式。
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| 关 键 词： | 浑水 低压 管道 临界不淤流速 阻力损失 |
| 文章编号： | 1000-1700（2007）01-0098-04 |
| 修稿时间： | 2006-05-27 |
Experimental on Muddy Water Delivery for Irrigation in Low-pressure Pipeline System |
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| HE Wu-quan,WANG Yu-bao,ZHANG Ying-pu,CAI Ming-ke.Experimental on Muddy Water Delivery for Irrigation in Low-pressure Pipeline System[J].Journal of Shenyang Agricultural University,2007,38(1):98-101. |
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| Authors: | HE Wu-quan WANG Yu-bao ZHANG Ying-pu CAI Ming-ke |
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| Institution: | College of Water Resources and Architectural Engineering, Northwest Sci-Tech University of Agricultureand Forestry, Shanxi Yangling 712100,China |
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| Abstract: | Calculating reference was deficiency for engineering design on muddy water delivery in low-pressure pipeline irrigation system.Non-depositing critical velocity was computed by the formula for material conveyance in pipeline.The muddy water resistance head was reckoned by the formula of clear water head loss.However,it was lack of applicability and reliability to do like that,and much bigger computational errors were generated.In this paper,the definition of non-depositing critical velocity for muddy water delivery in low-pressure pipeline irrigation system was brought forward.The muddy water resistance head and the non-depositing critical velocity were studied by experiments under different silt content.The results indicatd that non-depositing critical velocity enlarged with the increase of silt content.The muddy water resistance head increased with the augment of flow velocity or silt content.The experienced formulas of non-depositing critical velocity and muddy water resistance head for muddy water delivery in low-pressure pipeline irrigation system were drawn according to the testing data. |
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| Keywords: | muddy water low-pressure pipeline non-depositing critical velocity water head loss |
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