Transient damping method for narrowing down leak location in pressurized pipelines

IF 0.6 Q4 WATER RESOURCES

Hydrological Research Letters Pub Date : 2020-01-01 DOI:10.3178/hrl.14.41

Y. Asada, M. Kimura, Issaku Azechi, T. Iida, Naritaka Kubo

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引用次数: 6

Abstract

: Numerous leak detection methods have been developed for pipeline systems because of the shortage of water resources, increased water demand, and leak accidents. These methods have their advantages and disadvantages in terms of cost, labor, and accuracy; therefore, it is important to narrow down the location of a leak as easily, rapidly, and accurately as possible. This study applies the technologies based on the execution of a transient event (transient test-based technologies (TTBTs)), and a model is presented for representing the relation between the leak location and the damping of the pressure transient due to the leakage. The model is verified with laboratory experiments in which the leak location can be narrowed down to be less than 10% to 30% of the total pipe length. The model is found to be more effective if the leak location is nearer to the upstream end. In addition, the leak location found by the damping model varies with an approximate absolute error of 2% to 5% of the pipe length. It is suggested that the damping model is suitable for narrowing down and not for finding the leak location, and should be used in combination with other leak detection methods.

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压缩管道泄漏位置的瞬态阻尼法

由于水资源的短缺、用水需求的增加和泄漏事故的发生，许多管道系统的泄漏检测方法已经被开发出来。这些方法在成本、人工和准确性方面各有优缺点;因此，尽可能容易、快速和准确地缩小泄漏的位置非常重要。本研究应用了基于瞬态事件执行的技术(基于瞬态测试的技术(ttbt))，并提出了一个模型来表示泄漏位置与泄漏引起的瞬态压力阻尼之间的关系。通过室内实验对模型进行了验证，泄漏位置可以缩小到管道总长度的10% ~ 30%以内。结果表明，泄漏位置越靠近上游端，该模型越有效。此外，阻尼模型发现的泄漏位置变化近似的绝对误差为管道长度的2%至5%。建议阻尼模型适用于缩小泄漏位置，而不适用于寻找泄漏位置，应与其他泄漏检测方法结合使用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Hydrological Research Letters WATER RESOURCES-

CiteScore

1.90

自引率

18.20%

发文量

审稿时长

10 weeks

期刊介绍： Hydrological Research Letters (HRL) is an international and trans-disciplinary electronic online journal published jointly by Japan Society of Hydrology and Water Resources (JSHWR), Japanese Association of Groundwater Hydrology (JAGH), Japanese Association of Hydrological Sciences (JAHS), and Japanese Society of Physical Hydrology (JSPH), aiming at rapid exchange and outgoing of information in these fields. The purpose is to disseminate original research findings and develop debates on a wide range of investigations on hydrology and water resources to researchers, students and the public. It also publishes reviews of various fields on hydrology and water resources and other information of interest to scientists to encourage communication and utilization of the published results. The editors welcome contributions from authors throughout the world. The decision on acceptance of a submitted manuscript is made by the journal editors on the basis of suitability of subject matter to the scope of the journal, originality of the contribution, potential impacts on societies and scientific merit. Manuscripts submitted to HRL may cover all aspects of hydrology and water resources, including research on physical and biological sciences, engineering, and social and political sciences from the aspects of hydrology and water resources.