Author(s): Diego Norberto Bottelli

Linked Author(s): Diego Norberto Bottelli

Keywords: Transients; Modeling; Depressions; Air vessels; Measurements

Abstract: This paper presents the mathematical modeling studies carried out for the hydraulic transients protection design of a water pipeline system that includes a pumping station and two ductile iron aqueducts of 1200/1000mm in diameter, for about 18km length and a design flow of 2m3/s each. The system has no water reservoirs and the longitudinal profiles of pipelines are approximately flat, so the main problem during hydraulic transients due to pump failure is depression. Air vessels were adopted as hydraulic transient protection. The demand nodes, located along the main pipelines, are supplied directly through pressure control valves which also contribute to transient protection. To model these valves during hydraulic transients, a specific simplified methodology was developed. After system commissioning, data obtained from field measurements were used to verify the mathematical model. The results validated the model as a design tool and show that it is useful for studying transients in the existing aqueducts.

DOI: https://doi.org/10.3850/IAHR-39WC2521711920221715

Year: 2022