| 射流脉冲三通毛管灌水均匀性试验研究 |
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| 引用本文： | 肖思强,王新坤,徐胜荣,樊二东.射流脉冲三通毛管灌水均匀性试验研究[J].排灌机械工程学报,2018,36(7):632-638. |
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| 作者姓名： | 肖思强 王新坤 徐胜荣 樊二东 |
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| 作者单位： | 江苏大学国家水泵及系统工程技术研究中心, 江苏 镇江 212013 |
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| 摘 要： | 为了提高低压滴灌系统灌水均匀性,基于附壁与切换原理发明了射流脉冲三通发生器,试验研究了不同压力工况下脉冲频率、脉冲振幅2种因素对灌水均匀系数、流量偏差率的影响,并分析了脉冲条件下毛管铺设长度和进口压力对灌水均匀性的影响.结果表明:在毛管铺设长度相同时,不同低压下射流脉冲三通灌水均匀系数的平均值比普通三通提高了0.65%,流量偏差率明显低于普通三通,平均降幅为3.62%;低压条件下产生脉冲频率高于200次/min,脉冲振幅高于2.5 m;相同压力条件下,灌水均匀系数随毛管铺设长度的增大而降低,流量偏差率随毛管铺设长度的增大而显著增大;毛管铺设长度相同时,灌水器流量随进口压力增大而增大,进口流量也会随之增大.
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| 收稿时间： | 2017-03-22 |
Experimental study on irrigation uniformity of lateral pipe with jet-pulse tees |
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| XIAO Siqiang,WANG Xinkun,XU Shengrong,FANG Erdong.Experimental study on irrigation uniformity of lateral pipe with jet-pulse tees[J].Journal of Drainage and Irrigation Machinery Engineering,2018,36(7):632-638. |
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| Authors: | XIAO Siqiang WANG Xinkun XU Shengrong FANG Erdong |
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| Institution: | National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China |
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| Abstract: | In order to improve the irrigation uniformity of low pressure drip irrigation system, a jet-pulse tee generator was invented based on the attachment and switching principle. Effects of pulse frequency and amplitude on irrigation uniformity coefficient and flow rate deviation ratio were studied experimentally under various pressures conditions, and the influence of lateral pipe length and inlet pressure on irrigation uniformity coefficient was also analysed in pulse conditions. Results show that the irrigation uniformity coefficient of jet-pulse tee is 0.65 % higher than the ordinary tee in average and its mean deviation ratio is obviously lower than that of the ordinary tee, exhibiting a decrease by 3.62% in average. In addition, under low pressure conditions, the pulse frequency generated by the tee is higher than 200 times/min and the pulse amplitude is larger than 2.5 m. At an identical pressure, the irrigation uniformity coefficient decreases with increasing length of lateral pipe, but the flow rate deviation ratio increases considerably with the length. In the same length, the flow rate through the emitter increases with increasing inlet pressure, and so does the inlet flow rate. In a word, the pulse leteral pipe is only concerned. However, the irrigation uniformity of a pulse branch and a pulse irrigation area will be tackled in the future. Nevertheless, this will extend drip irrigation equipment, and is an effective way to create a high-performance drip irrigation system. |
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| Keywords: | irrigation uniformity jet-pulse tee pulse frequency pulse amplitude |
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