Journal ArticleDOI
Partial Blockage Detection in Pipelines by Frequency Response Method
Ahmed M. A. Sattar,Ahmed M. A. Sattar,M. Hanif Chaudhry,M. Hanif Chaudhry,Ahmed Kassem,Ahmed Kassem +5 more
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TLDR
In this technique, the pressure transient history at only one location is sufficient, and the history of the transient in the pipe prior to blockage is not needed, which is an advantage over a number of other available techniques, in addition to being simpler to use.Abstract:
A new technique is presented utilizing the frequency response for the detection of partial blockages in a pipeline. In the system frequency response, a partial blockage increases the amplitude of the pressure oscillations at even harmonics. Such an increase in amplitude has an oscillatory pattern, the frequency and amplitude of which may be used to predict the location and size of a partial blockage. In this technique, the pressure transient history at only one location is sufficient, and the history of the transient in the pipe prior to blockage is not needed, which is an advantage over a number of other available techniques, in addition to being simpler to use. It is shown that the technique successfully detects the location of a blockage in a number of simple systems with blockage size as small as 10%. The technique is verified by comparing the computed results with those computed by the method of characteristics and with measurements from simple laboratory setups. A number of practical issues and limitations for field implementations are discussed.read more
Citations
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Journal ArticleDOI
Anomaly pre-localization in distribution–transmission mains by pump trip: preliminary field tests in the Milan pipe system
Silvia Meniconi,Bruno Brunone,Marco Ferrante,Caterina Capponi,C. A. Carrettini,C. Chiesa,D. Segalini,E. A. Lanfranchi +7 more
TL;DR: The reliability of transients due to pump trip as a powerful tool for the pre-localization of anomalies in real pipe systems is tested and the results are corroborated by repairs executed by MM in the area where possible anomalies have been pre- localized.
Journal ArticleDOI
Water-hammer pressure waves interaction at cross-section changes in series in viscoelastic pipes
TL;DR: In this paper, a quasi-steady-state approach for local head loss simulation has been demonstrated in viscoelastic pipes and the model parameters obtained on the basis of transients carried out in single pipe systems have then been used to simulate transients in more complex pipe systems.
Journal ArticleDOI
Small Amplitude Sharp Pressure Waves to Diagnose Pipe Systems
TL;DR: In this paper, the possibility of using transient tests, generated by the Portable Pressure Wave Maker (PPWM) device, as a powerful tool in the management of pipe systems is demonstrated.
Journal ArticleDOI
Extended blockage detection in pipelines by using the system frequency response analysis
TL;DR: In this paper, the authors proposed a technique for the detection of extended blockages in pressurized water pipelines by using the system frequency responses under transient conditions, and they demonstrated that the extended blockage in pipeline can be detected by the proposed method as long as the system resonant frequencies are accurately determined.
Journal ArticleDOI
Experimental Investigation of Coupled Frequency and Time-Domain Transient Test–Based Techniques for Partial Blockage Detection in Pipelines
Silvia Meniconi,Huanfeng Duan,Pedro J. Lee,Bruno Brunone,Mohamed Salah Ghidaoui,Marco Ferrante +5 more
TL;DR: In this article, two previously developed techniques, pressure signal analysis (PSA) and frequency response analysis (FRA), are experimentally tested on systems of different pipe material and characteristics.
References
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Book
Fluid Transients in Systems
TL;DR: In this article, the authors proposed valve stoking methods for controlling transients in multi-pipe and non-pipe transients caused by turbomachines and single-component two-phase transient flows.
Journal ArticleDOI
Pipe system diagnosis and leak detection by unsteady-state tests. 1. Harmonic analysis
Marco Ferrante,Bruno Brunone +1 more
TL;DR: In this paper, the wavelet transform is used to detect local singularities in the pressure time history due to the presence of a leak, which reveals the arrival time of the reflected pressure wave and is the basis for leak location.
Journal ArticleDOI
Detecting leaks in pressurised pipes by means of transients
Bruno Brunone,Marco Ferrante +1 more
TL;DR: In this article, the authors show that reliable and quick techniques are needed to locate and estimate leaks in pressurised pipe systems in order to reduce water loss as much as possible.