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Debora Falocci
Università di Perugia
water hammer
pressure transients
water distribution network
PHD school
International Doctoral Program in Civil and Environmental Engineering
PhD Cycle
39
List of Supervisors
Silvia Meniconi, Caterina Capponi
Main research approches
Laboratory-scaled physical models, Field-based and/or remote sensing, Numerical analysis
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Research abstract
Modeling Transients Response in Complex Pressurized Networks
Background And Research Gaps
Water systems’ pipelines are daily stressed by transients induced by the water hammer effect and the generated waves propagate through the network. This phenomenon arises from sudden valve operations, pump activation/deactivation, and equipment failures. Until now, studying the transients behaviour has always been focused on numerical simulations, field tests or laboratory-scale tests. However, this study aims to investigate transients using full-scale installations in the laboratory, complemented by numerical simulations and field tests. The Water Engineering Laboratory (WEL) of the University of Perugia, with its wide dimensions (nearly 1000 m2), allows to host experimental installations to get closer and closer to the functioning of real systems. Studying complex systems in the laboratory enables controlled, repeatable tests and precise measurement everywhere.
Research Goals
The aim of this research is the modeling of pressurized networks comprised of both polymeric and metallic pipes. A key aspect under investigation is the in-depth examination of the viscoelastic behavior of polymeric materials. This comprehensive analysis is aimed at elucidating the significant influence this property has on transient response dynamics, especially when compared to the behavior of metallic pipes.
Methods
Numerical simulations, laboratory and field tests.
Results
Following the research project, the expectation is to develop a model capable of describing the behavior of induced transients in the complex system of pipelines, taking into account the influence of material, viscoelasticity and other factors, such as changes in network topology, the effect of the discharge or of control devices (e.g., pressure reducing valve). This model would enable the identification of sections where the network is more stressed and, therefore, more exposed to failures. The research project can be highly valuable in assisting managing authorities to gain a better understanding of the water network's functioning, enhancing monitoring and maintenance operations at critical points.