Abstract
In a previous paper, the authors proposed a transient-based area reconstruction method to identify multiple blockages in pipe systems without prior knowledge of their geometry and number, resulting in very accurate numerical results. In this paper, the accuracy and robustness of the method is verified in a real laboratory system in which the experimental setup considers mild ( reduction in area) and severe ( reduction in area) blockage cases. It is found that both blockage cases can be successfully identified; however, there are some differences between the actual and estimated pipe areas. These differences are shown to be mainly due to the limited frequency bandwidth (FBW) of the generated transient wave, causing three major errors: (1) distortion of the image of the step changes in area, (2) uneven distortion of the image of the two sharp changes of the area, and (3) underestimation of the blockage severity. These limitations and errors are discussed in detail in the paper.
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Data Availability Statement
Some or all data, models, or code generated or used during the study are available from the corresponding author by request.
Acknowledgments
This research is funded by the postgraduate studentship and by the Research Grant Council of the Hong Kong SAR, China [Project No. T21-602/15R, title: Smart Urban Water Supply Systems (Smart UWSS)].
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Journal of Hydraulic Engineering
Volume 146 • Issue 3 • March 2020
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©2020 American Society of Civil Engineers.
History
Received: Aug 3, 2018
Accepted: Jun 12, 2019
Published online: Jan 9, 2020
Published in print: Mar 1, 2020
Discussion open until: Jun 9, 2020
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