Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.21/1329
Título: Surge damping analysis in pipe systems: modelling and experiments
Autor: Ramos, H.
Covas, D.
Borga, Alexandre
Loureiro, D.
Palavras-chave: Surge damping
Energy dissipation
Elastic or non-elastic behaviour
Pressure oscillations
Polymeric additional pipe
Unsteady-flow
Energy-dissipation
Transient
Friction
Turbulent
Networks
Quasi-2D
Data: 2004
Editora: Int Assoc Hydraulic Research
Citação: Ramos H, Covas D, Borga A, Loureiro D. Surge damping analysis in pipe systems: modelling and experiments.Journal of Hydraulic Research. 2004; Volume 42, Issue 4, 413-425.
Relatório da Série N.º: 42
Resumo: The current study focuses on the analysis of pressure surge damping in single pipeline systems generated by a fast change of flow, conditions. A dimensionless form of pressurised transient flow equations was developed. presenting the main advantage of being independent of the system characteristics. In lack of flow velocity profiles. the unsteady friction in turbulent regimes is analysed based on two new empirical corrective-coefficients associated with local and convective acceleration terms. A new, surge damping approach is also presented taking into account the pressure peak time variation. The observed attenuation effect in the pressure wave for high deformable pipe materials can be described by a combination of the non-elastic behaviour of the pipe-wall with steady and unsteady friction effects. Several simulations and experimental tests have been carried out. in order to analyse the dynamic response of single pipelines with different characteristics, such as pipe materials. diameters. thickness. lengths and transient conditions.
Peer review: yes
URI: http://hdl.handle.net/10400.21/1329
ISSN: 0022-1686
Aparece nas colecções:ISEL - Eng. Civil - Artigos

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