Author(s): Helena Ramos; Didia Covas; A. B. De Almeida
Linked Author(s): Dídia Isabel Cameira Covas, A.P. Betamio de Almeida
Keywords: Dynamic effects; Pipe-wall behaviour; Water pipe systems
Abstract: When computer analysis is commonplace in the design process, none of them lay down guidance for dynamic effects in pipe systems. Research work based on the flow acceleration/deceleration and in mechanical response of the pipe-wall materials is developed in order to better understand the pipe system response under transient conditions for pressurised flows. These effects have been performed by using collect data in transient tests carried out for different pipe system’s characteristics (two experimental facilities) and mathematical modelling. Current commercial transient solvers cannot accurately predict the head oscillations in pipes with non-elastic rheological pipe-wall behaviour, such as polyethylene PE, whose application on water supply systems has increased during the last years. Experimental procedures are carried out aiming at the collection of data sets of dynamic effects through pressure time variation and flow velocity fields. The characterization of each phenomenon is presented in order to better understand the pressure wave propagation in terms of, phase and shape.
Year: 2005