引用本文: | 李道西,刘欢,侯皓森,等.纵向结构优化下微喷带喷洒特性的研究[J].灌溉排水学报,0,():-. |
| Li Daoxi,Liu Huan,Hou Haosen,et al.纵向结构优化下微喷带喷洒特性的研究[J].灌溉排水学报,0,():-. |
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纵向结构优化下微喷带喷洒特性的研究 |
李道西, 刘欢, 侯皓森, 周庭全, 卢争光, 高世凯, 李彦彬
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华北水利水电大学水利学院
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摘要: |
为了探究纵向结构优化对改善微喷带喷洒均匀度的效果,采用市场上常见的N32斜3孔(CK1)和N32斜5孔(CK2)微喷带为对照组,以30m斜3孔组合10 m斜5孔微喷带(T31)、20 m斜3孔组合20 m斜5孔微喷带(T11)为试验组,研究4个首端工作压力下4种结构微喷带的喷洒特性。结果表明:工作压力与微喷带结构是影响微喷带喷洒特性的主要因素;首端压力越大、微喷带孔数越多,沿管长方向压力损失越大;同一结构的微喷带,工作压力越大,单孔流量越大;相同工作压力下,CK2首端的单孔流量要大于CK1,但CK2末端单孔流量小于CK1,结构优化下的T11,其首尾端的单孔流量变化相对均匀。CK2在压力增大情况下,水量分布范围增大,水量分布均匀性增大,压力变小后,水量分布仅限于管带附近;增加压力会提升微喷带喷洒均匀度,但并不是压力越大均匀度越高,不同结构的微喷带存在最优工作压力范围,本试验中T11在0.035 MPa工作压力下,整体喷洒均匀度最大。在微喷带末端通过减小孔间距离和增加孔数能提高喷洒均匀度,为了保障实际工作中的均匀度,应根据微喷带的结构选择合适的工作压力。 |
关键词: 微喷带;工作压力;结构优化;喷洒特性 |
DOI: |
分类号:S275.5 |
基金项目:国家自然科学基金项目:基于水文-水质-作物生长耦合模型的引黄灌区节水灌溉模式研究(52179015);河南省重点研发与推广项目(212102110031) |
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Study on spraying characteristics of micro spray tape under longitudinal structure optimization |
Li Daoxi, Liu Huan, Hou Haosen, Zhou Tingquan, Lu Zhengguang, Gao shikai, Li yanbin
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North China University of Water Resources and Electric Power
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Abstract: |
in order to explore the effect of longitudinal structure optimization on improving the spraying uniformity of micro spray tape, taking N32 inclined 3-hole (CK1) and N32 inclined 5-hole (CK2) micro spray tape commonly used in the market as the control group, 30m inclined 3-hole combined 10m inclined 5-hole micro spray tape (T31) and 20m inclined 3-hole combined 20m inclined 5-hole micro spray tape (T11) as the test group, the spraying characteristics of four kinds of micro spray tapes under four head end working pressures were studied. The results show that working pressure and micro spray tape structure are the main factors affecting the spray characteristics of micro spray tape; The greater the head end pressure and the more holes in the micro jet, the greater the pressure loss along the pipe length; For the micro spray tape with the same structure, the greater the working pressure is, the greater the single hole flow is; Under the same working pressure, the single hole flow at the head end of CK2 is greater than CK1, but the single hole flow at the end of CK2 is less than CK1. For T11 under structural optimization, the single hole flow at the head and tail ends changes relatively evenly. CK2 when the pressure increases, the water distribution range increases and the uniformity of water distribution increases. After the pressure decreases, the water distribution is limited to the vicinity of the pipe tape; Increasing the pressure will improve the irrigation uniformity of the micro spray tape, but it is not that the greater the pressure, the higher the uniformity. There is an optimal working pressure range for the micro spray tape with different structures. In this test, the overall spraying uniformity of T11 is the largest under the working pressure of 0.035MPa. At the end of the micro spray tape, the spraying uniformity can be improved by reducing the distance between holes and increasing the number of holes. In order to ensure the uniformity in the actual work, the appropriate working pressure should be selected according to the structure of the micro spray tape. |
Key words: micro-spray tape; working pressure; Structural optimization; Spraying characteristics |
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