Influences of Wall Thickness of Polypropylene Pipe on Emitter Performance

YU Li-ming

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Influences of Wall Thickness of Polypropylene Pipe on Emitter Performance

- Influences of Wall Thickness of Polypropylene Pipe on Emitter Performance
- Bulletin of Soiland Water Conservation Vol. 30, Issue 3, Pages: 108-112(2011)
- 作者机构：
  
  1. 清华大学水利系,北京,100084
  2. 长沙理工大学水利工程学院,湖南,长沙,410114
- 作者简介：
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- Published：2011
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YU Li-ming. Influences of Wall Thickness of Polypropylene Pipe on Emitter Performance[J]. Bulletin of Soiland Water Conservation, 2011, 30(3): 108-112.
DOI：

YU Li-ming. Influences of Wall Thickness of Polypropylene Pipe on Emitter Performance[J]. Bulletin of Soiland Water Conservation, 2011, 30(3): 108-112. DOI：

摘要

为提高圆柱灌水器流量设计精度及滴灌系统的均匀度，以7种圆柱灌水器和4种壁厚组成的25种滴灌管作为研究对象，利用精密微小物体三维扫描仪MCS-60型测量灌水器流道结构参数，并采用自动化程度较高的灌水器水力性能测试平台测试此25种滴灌管，得出其流量压力曲线关系、流量系数和流态指数。测试结果表明，使用不同聚乙烯(PE)管厚度对同一灌水器的流量确实产生影响，其最大影响率能达到20%;不同的PE管壁厚对流量系数影响较大，但对流态指数影响较小;灌水器流道宽度也是造成不同PE管壁厚对灌水器出流的因素，流道越宽，对灌水器出流影响越大。

Abstract

To improve the uniformity of irrigation system and the design precision level of emitters

this study using a 3D camge measurement system(MCS-60)measured the structural parameters of channels in twenty-five combinations(from seven cylinder emitters and four pipe thickness).The hydraulic performances of the combinations were also tested by an automatic testing platform.The curves of the flow and pressure

flow rate coefficient and flow index were obtained.The results show that the flow rates of the same emitters can varied up to 20% with polypropylene (PE)pipes of different wall thickness.The PE pipe thickness affected the flow rate coefficients greatly

and the flow index to a less degree.The width of the emitter flow path was another factor for the influence of the PE pipe wall thickness.The more the width of the flow path

the bigger the change caused by pipe wall thickness.

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