Effect of hydraulic and geometric factors upon leakage flow rate in pressurized pipes

Efeito de fatores hidráulicos e geométricos sobre a vazão através de vazamentos em condutos pressurizados

ABSTRACT

Computational Fluid Dynamics (CFD) simulations of a leakage in a pressurized pipe were undertaken to determine the empirical effects of hydraulic and geometric factors on the leakage flow rate. The results showed that pressure, leakage area and leakage form, influenced the leakage flow rate significantly, while pipe thickness and mean velocity did not influence the leakage flow rate. With relation to the interactions, the effect of pressure upon leakage flow rate depends on leakage area, being stronger for great leakage areas; the effects of leakage area and pressure on leakage flow rate is more pronounced for longitudinal leakages than for circular leakages. Finally, our results suggest that the equations that predict leakage flow rate in pressurized pipes may need a revision.

Keywords:
CFD; Factorial design; Leakage area; Leakage flow rate; Leakage form; Pressurized pipe