浑水滴灌过程中不同类型滴头堵塞的动态变化特征
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国家自然科学基金项目(51679205)和国家重点研发计划项目(2016YFC0400202)


Dynamic Characteristics of Different Emitters Clogging in Drip Irrigation with Muddy Water
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    摘要:

    为了研究滴头类型对浑水滴灌滴头堵塞的影响过程,选取7种滴头、配置2种浑水进行周期性间歇灌水试验,提出了滴头结构系数指标,对比分析了不同类型滴头的堵塞状况。结果表明:滴头类型是影响滴头堵塞的重要因素,滴头结构系数可作为衡量不同类型滴头抗堵塞性能的重要指标,滴头抗堵塞性能随着结构系数增大而提高。结构系数相同的2种不同浑水试验后,圆柱滴头的平均相对流量均大于片式滴头,当结构系数为2%时,2种浑水试验后,圆柱滴头的平均相对流量分别为91.66%和79.63%,而片式滴头的平均相对流量仅为75.84%和65.08%;随着灌水次数的增加,片式滴头比圆柱滴头更容易发生大部分滴头整体堵塞现象;不同类型滴头堵塞物质量随着结构系数增大而减小,圆柱滴头和片式滴头结构系数由大到小依次为E1、E2、E3和E4、E5、E7、E6,2种浑水试验后,滴头堵塞物质量由大到小依次为E3、E2、E1和E6、E7、E5、E4。

    Abstract:

    In order to explore the influence of emitter type on the process of emitter clogging in drip irrigation with muddy water,seven kinds of emitters were selected and two kinds of muddy water were allocated for periodic intermittent irrigation tests. Clogging characteristics of different emitters were compared by putting forward the emitter structure coefficient. The results showed that the type of emitter was an important factor affecting the blockage of emitter, and the structure coefficient of emitter could be used as an important index to measure the antiblockage performance of the different emitters. The anti-clogging performance of emitter was increased with the increase of structure coefficient. When the structure coefficients were the same, the relative flow rate of the cylindrical emitter was larger than that of the flat emitter after two different muddy water tests. For example, when the structure coefficient was 2%, the relative flow rate of the cylindrical emitter was 91.66% and 79.63%, respectively. However, the relative flow rate of the flat emitter was only 75.84% and 65.08%. With the increase of irrigation times, the overall blockage of most emitters was more likely to occur in the flat emitters than in the cylindrical emitters. The clogging mass of different emitters was decreased with the increase of structure coefficient. The order of the structure coefficient of cylindrical emitters and flat emitters in descending trend was E1, E2, E3 and E4, E5, E7, E6. However, the order of the emitters clogging mass after two kinds of muddy water tests in descending trend was E3, E2, E1 and E6, E7, E5, E4.

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温圣林,牛文全,邬梦龙,张文倩,李学凯,杨小坤.浑水滴灌过程中不同类型滴头堵塞的动态变化特征[J].农业机械学报,2020,51(3):287-294. WEN Shenglin, NIU Wenquan, WU Menglong, ZHANG Wenqian, LI Xuekai, YANG Xiaokun. Dynamic Characteristics of Different Emitters Clogging in Drip Irrigation with Muddy Water[J]. Transactions of the Chinese Society for Agricultural Machinery,2020,51(3):287-294.

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  • 收稿日期:2019-07-28
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  • 在线发布日期: 2020-03-10
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