Elastic Water Column Model for Hydraulic Transient Analysis of Pipe Networks

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dc.contributor.authorZeng, W.
dc.contributor.authorZecchin, A.C.
dc.contributor.authorLambert, M.F.
dc.date.issued2022
dc.description.abstractThe transient behavior of pipe systems is typically simulated using water hammer models [such as the method of characteristics (MOC)], or rigid water column (RWC) models depending on whether the hydraulic transition is fast or gradual. In this paper, an elastic water column (EWC) model for analyzing hydraulic transients in pipe networks is formulated using a novel graph-theoretic approach. The new method of modeling a network with a state-space representation inherits the advantages of the RWC model, such as its high computational efficiency and potential to integrate with modern control theory and signal analysis algorithms. Meanwhile, the proposed method incorporates water compressibility and is therefore significantly more accurate than the standard RWC models, and is shown to be equivalent to MOC models below a critical frequency. Another advantage of the new model is its elegantly simple formulation for an arbitrarily configured pipe network. The accuracy of the model was validated numerically on 6- and 51-pipe networks. The simulated results of the 51-pipe network demonstrate that the transient pressures in a large-scale pipe network dominate in the low-frequency range where the EWC model has high accuracy. These results demonstrate the utility of the proposed method to provide a flexible solution to optimize accuracy and efficiency for simulating hydraulic transient events in pipeline networks. The EWC model has great potential to be combined with other control and signal analysis techniques because of its state-space representation of a water network.
dc.description.statementofresponsibilityWei Zeng, Aaron C. Zecchin, and Martin F. Lambert
dc.identifier.citationJournal of Hydraulic Engineering, 2022; 148(12):04022027-1-04022027-10
dc.identifier.doi10.1061/(asce)hy.1943-7900.0002028
dc.identifier.issn0733-9429
dc.identifier.issn1943-7900
dc.identifier.orcidZeng, W. [0000-0003-3525-0432]
dc.identifier.orcidZecchin, A.C. [0000-0001-8908-7023]
dc.identifier.orcidLambert, M.F. [0000-0001-8272-6697]
dc.identifier.urihttps://hdl.handle.net/2440/146119
dc.language.isoen
dc.publisherAmerican Society of Civil Engineers (ASCE)
dc.rights© 2022 American Society of Civil Engineers.
dc.source.urihttps://doi.org/10.1061/(asce)hy.1943-7900.0002028
dc.subjectHydraulic transient; Water hammer; Water distribution system; Electricity equivalent circuit; Graph theory.
dc.titleElastic Water Column Model for Hydraulic Transient Analysis of Pipe Networks
dc.typeJournal article
pubs.publication-statusPublished

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