Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Damping Analysis of Hydraulic Transients in Pump-Rising Main Systems
This paper focuses on the analysis of unsteady pipe flows caused by a pump trip in a water pipeline system. Field experiments have been carried out to collect transient pressure and steady-state flow rate data in the Prado–Instituto Politécnico da Guarda (IPG) pumping system located in Guarda, Portugal. Observed transient pressures were compared with numerical results. Results obtained were excellent both in terms of damping and phase shift of the transient pressure signal, provided that unsteady friction effects were taken into account and an appropriate downstream end boundary condition was considered. The downstream end boundary condition was described by small tanks with variable level and with free discharge into the storage tank; the variation of water level in these small tanks results in the relief of extreme transient pressures (conversely to what is observed in the line-packing effect) and changes the shape of transient pressure waves. This analysis has shown that classical water hammer theory (neglecting unsteady friction) and the consideration of a constant-level reservoir at the downstream end do not accurately describe the observed transient behavior of pressurized pipe systems.
Damping Analysis of Hydraulic Transients in Pump-Rising Main Systems
This paper focuses on the analysis of unsteady pipe flows caused by a pump trip in a water pipeline system. Field experiments have been carried out to collect transient pressure and steady-state flow rate data in the Prado–Instituto Politécnico da Guarda (IPG) pumping system located in Guarda, Portugal. Observed transient pressures were compared with numerical results. Results obtained were excellent both in terms of damping and phase shift of the transient pressure signal, provided that unsteady friction effects were taken into account and an appropriate downstream end boundary condition was considered. The downstream end boundary condition was described by small tanks with variable level and with free discharge into the storage tank; the variation of water level in these small tanks results in the relief of extreme transient pressures (conversely to what is observed in the line-packing effect) and changes the shape of transient pressure waves. This analysis has shown that classical water hammer theory (neglecting unsteady friction) and the consideration of a constant-level reservoir at the downstream end do not accurately describe the observed transient behavior of pressurized pipe systems.
Damping Analysis of Hydraulic Transients in Pump-Rising Main Systems
Soares, Alexandre Kepler (Autor:in) / Covas, Dídia I. C. (Autor:in) / Ramos, Helena M. (Autor:in)
Journal of Hydraulic Engineering ; 139 ; 233-243
21.07.2012
112013-01-01 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Damping Analysis of Hydraulic Transients in Pump-Rising Main Systems
| Online Contents | 2013
Damping Analysis of Hydraulic Transients in Pump-Rising Main Systems
| British Library Online Contents | 2013
High Reynolds number transients in a pump rising main. Field tests and numerical modeling
| British Library Conference Proceedings | 2001
Hydraulic transients for a pipe line network of treated effluent rising main using SAP 2R
| DOAJ | 2022
Analysis of hydraulic transients
| TIBKAT | 1982