What Is a Safe Filling Velocity in Water and Wastewater Pipelines?
Publication: Pipelines 2023
ABSTRACT
While being filled, water and wastewater pipelines may be exposed to complex transient two-component (air and liquid) flow, which may impose significant transient pressures on the pipeline system. This paper presents a novel numerical model for simulating the transient response of water and wastewater pipelines during filling. Numerical exploration with a hypothetical pipe system concludes that (1) the resulting transient pressures depend on the shape and number of undulations in the profile of the pipeline; (2) the affirmation that the severity of the resulting transient pressures increases as the filling velocity increases; (3) irrespective of the filling velocity, undesirable transient conditions can be mitigated by properly sizing key air valves in the system; and (4) even a low filling velocity of 0.3 m/s may induce negative pressures in the pipeline when a high enough overpressure onset at an air valve is reflected at the filling water column front.
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REFERENCES
AWWA (American Water Works Association). (2001). Air-release, air/vacuum, and combination air valves. Denver, Colorado, US: American Water Works Association.
Cabrera, E., Abreu, J., Perez, R., and Vela, A. (1992). Influence of liquid length variation in hydraulic transients. Journal of Hydraulic Engineering, 118(12), 1639–1650.
Izquierdo, J., Fuertes, V., Cabrera, E., Iglesias, P., and García Serra, J. (1999). Pipeline start-up with entrapped air. Journal of Hydraulic Research, 37(5), 579–590.
Malekpour, A., and Karney, B. W. (2011). Rapid filling analysis of pipelines with undulating profiles by the method of characteristic. ISRN Applied Mathematics, Article ID 930460, 16 pages, https://doi.org/10.5402/2011/930460.
Malekpour, A., and Karney, B. W. (2014a). Profile-induced column separation and rejoining during rapid pipeline filling. Journal of Hydraulic Engineering, 140(11).
Malekpour, A., and Karney, B. W. (2014b). Column separation and rejoinder during rapid pipeline filling induced by a partial flow blockage. Journal of Hydraulic Research, 52(5), 693–704.
Malekpour, A., and Karney, B. W. (2019). Complex interactions of water, air and its controlled removal during pipeline filling operations. Fluid Mechanics Research International Journal, 3(1), 4–15.
Pachaly, R. L., Vasconcelos, J. G., and Allasia, D. G. (2021). Surge predictions in a large stormwater tunnel system using SWMM. Urban Water Journal, 1–8.
Wylie, E. B., and Streeter, V. L. (1993). Fluid transients in systems. Upper Saddle River, N.J.: Prentice-Hall.
Zhou, L., Liu, D., Karney, B., Zhang, Q., and Ou, C. (2011). Influence of entrapped air pockets on hydraulic transients in water pipelines. Journal of Hydraulic Engineering, 137(2), 1686–1692.
Information & Authors
Information
Published In
Pipelines 2023
Pages: 301 - 312
History
Published online: Aug 10, 2023
ASCE Technical Topics:
- Continuum mechanics
- Dynamic pressure
- Dynamics (solid mechanics)
- Engineering fundamentals
- Engineering mechanics
- Environmental engineering
- Flow (fluid dynamics)
- Fluid dynamics
- Fluid mechanics
- Fluid velocity
- Hydrologic engineering
- Infrastructure
- Models (by type)
- Numerical models
- Pipeline systems
- Pipelines
- Pipes
- Pressure (type)
- Pressure pipes
- Solid mechanics
- Transient response
- Velocity profile
- Wastewater management
- Water and water resources
- Water pipelines
- Water treatment
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