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On the transient flow behavior in pressurized plastic pipe-based water supply systems
Journal of Water Supply: Research and Technology ( IF 4.3 ) Pub Date : 2021-01-01 , DOI: 10.2166/aqua.2020.051
Badreddine Essaidi 1 , Ali Triki 2
Affiliation  

Plastic material pipes such as high- or low-density polyethylene (HDPE or LDPE) are increasingly used in new or renewed water supply systems. Therefore, analysis of water hammer surge-waves initiated into such piping systems deserves investigation. The 1-D pressurized-pipe flow model embedding the Ramos formulation was used to describe the flow behavior in the elastic and plastic pipe-based hydraulic system. Numerical computations were performed using the method of characteristics. First, the numerical solver was validated against experimental data, available from the literature. Then, the proposed solver was applied to explore the transient pressure-wave behavior resulting from the power failure to a pumping station. Results evidenced the severity of such a scenario with regards to induced positive and negative pressure-wave magnitudes. Furthermore, the findings of this study suggested that plastic pipe-wall materials allowed a significant attenuation of pressure-wave magnitude in conjunction with the expansion of the pressure-wave oscillation period. It was also found that the observed attenuation and expansion effects depended strongly upon the plastic material type. In this respect, the results revealed that LDPE provided a better trade-off between the two last effects than HDPE.



中文翻译:

关于加压塑料管式供水系统中的瞬态流动行为

诸如高密度或低密度聚乙烯(HDPE或LDPE)之类的塑料管道越来越多地用于新的或更新的供水系统中。因此,对进入此类管道系统的水锤浪涌波的分析值得研究。嵌入Ramos公式的一维加压管流动模型用于描述基于弹性和塑料管的液压系统中的流动行为。使用特征方法进行数值计算。首先,将数值求解器与可从文献中获得的实验数据进行验证。然后,将所提出的求解器用于探讨由于停电给泵站造成的瞬态压力波行为。结果证明了这种情况在引起正负压力波幅度方面的严重性。此外,这项研究的结果表明,塑料管壁材料与压力波振荡周期的扩大相结合,可以使压力波幅度显着衰减。还发现观察到的衰减和膨胀效应在很大程度上取决于塑料材料的类型。在这方面,结果表明,与HDPE相比,LDPE在最后两种效果之间提供了更好的折衷。

更新日期:2021-01-26
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