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Transient tests for locating and sizing illegal branches in pipe systems

机译:瞬态测试,用于定位管道系统中的非法分支并确定其大小

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摘要

In pipe systems illegal branches can take away remarkable water resources with negative effects from both the economic and technical points of view. Difficulties in pointing out illegal branches by means of steady-state pressure and discharge measurements are mainly due to the fact that, of course, such systems are not active according to a regular time schedule, In this paper the possibility of using Transient Test-Based Techniques (TTBT) for the location and sizing of branches is shown. Specifically, tests carried out in different branched pipe systems at the Water Engineering Laboratory of the University of Perugia, Italy, show that TTBT allow us to detect branches irrespective of whether they are active or not. To improve the precision of the localization, arrival times of pressure waves are detected by means of wavelet analysis. Finally, a simple relation based on the water hammer theory is proposed to size the branch reliably.
机译:在管道系统中,从经济和技术角度来看,非法分支机构都可能夺走大量水资源,从而产生负面影响。通过稳态压力和流量测量来指出非法分支的困难主要是由于这样的事实:当然,这样的系统不会按照常规时间表处于活动状态。在本文中,可以使用基于暂态测试的方法显示了用于定位和确定分支大小的技术(TTBT)。具体来说,在意大利佩鲁贾大学水工程实验室的不同分支管道系统中进行的测试表明,TTBT允许我们检测分支,而无论它们是否活跃。为了提高定位精度,通过小波分析来检测压力波的到达时间。最后,提出了一种基于水锤理论的简单关系来可靠地确定分支的大小。

著录项

  • 来源
    《Journal of Hydroinformatics》 |2011年第3期|p.334-345|共12页
  • 作者单位

    Dipartimento di Ingegneria Civile ed Ambientale,university of Perugia,Via G. Duranti 93,1-06125 Perugia,Italy;

    Dipartimento di Ingegneria Civile ed Ambientale,university of Perugia,Via G. Duranti 93,1-06125 Perugia,Italy;

    Dipartimento di Ingegneria Civile ed Ambientale,university of Perugia,Via G. Duranti 93,1-06125 Perugia,Italy;

    Dipartimento di Ingegneria Civile ed Ambientale,university of Perugia,Via G. Duranti 93,1-06125 Perugia,Italy;

  • 收录信息 美国《科学引文索引》(SCI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    apparent losses; illegal connections; pipe system; transient;

    机译:表观损失;非法连接;管道系统短暂的;

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