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A Numerical Model for Experimental Designs of Vibration-Based Leak Detection and Monitoring of Water Pipes Using Piezoelectric Patches

机译：基于振动泄漏检测和使用压电贴片的水管监测的实验设计数值模型

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摘要

While the potential use of energy harvesters as structural health monitors show promise, numerical models related to the design, deployment and performance of such monitors often present significant challenges. One such challenge lies in the problem of leak detection in fluid-carrying pipes. Recent advances in experimental studies on energy harvesters for such monitoring has been promising but there is a paucity in existing literature in linking relevant fluid–structure interaction models around such applications. This paper addresses the abovementioned issue by developing a numerical model with Computational Fluid Dynamics (CFD) and Finite Element (FE) tools and carries out extensive analyses to compare it with existing experiments under controlled laboratory conditions. Conventional Polyvinylidene Fluoride (PVDF) films for leak detection and monitoring of water pipes were considered in this regard. The work provides guidelines on parameter selection and modeling for experimental design and repeatability of results for these types of experiments in future, around the demands of leak monitoring. The usefulness of such models is also demonstrated through the ability to estimate the optimum distribution frequency of these sensors that will enable the detection of the smallest leak of consequence under a known or established flow condition.
机译：虽然潜在使用能量收割机作为结构健康监测器，但展示了与设计，部署和此类监视器的设计，部署和性能相关的数值模型通常存在重大挑战。一种这样的挑战在于流体携带管道中的泄漏问题。用于这种监测的能量收割机实验研究的最新进展是有前途的，但现有文献中的缺乏在这些应用周围连接相关的流体结构相互作用模型。本文通过开发具有计算流体动力学（CFD）和有限元（FE）工具的数值模型来解决上述问题，并进行广泛的分析，以将其与受控实验室条件下的现有实验进行比较。在这方面考虑了用于泄漏检测和监测水管的常规聚偏二氟乙烯（PVDF）薄膜。该作品提供了对参数选择和建模的指导，用于将来对这些类型的实验结果的实验​​设计和可重复性，围绕泄漏监测的要求。还通过估计这些传感器的最佳分布频率的能力来证明这种模型的有用性，这将使能够在已知或建立的流动条件下检测最小的后果。

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