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Experimental Investigation on Translational Velocity and Air Pockets Volumes Associated with Pressure Transients in Rectangular Conduits of Stormwater Systems

Author(s): Juliana Kaiber Da Silva, Jose G. Vasconcelos

Linked Author(s): Juliana Kaiber Da Silva

Keywords: Air-water interactions; Two-phase unsteady flows in stormwater systems; Hydraulic physical modelling; Geometrical singularity;

Abstract: Severe structural damages in stormwater systems are related to two-phase unsteady flows and interactions between air and water phases. The entrapment of air pockets in stormwater systems may be triggered during the transition between free surface to pressurized flow regimes. This paper presents an experimental investigation concerning the movement of air pockets through a geometrical singularity present in the system. The experiments were accomplished in a physical model located at the Federal University of Rio Grande do Sul (Porto Alegre, Brazil). The results indicate that non-negligible pressure oscillations may be expected in the system when an air pocket passes through a geometrical singularity.

DOI: https://doi.org/10.3850/38WC092019-1042

Year: 2019

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