Transient phenomena during the emptying process of a single pipe with water–air interaction
Emptying pipelines can be critical in many water distribution networks because subatmospheric pressure troughs could cause considerable damage to the system due to the expansion of entrapped air. Researchers have given relatively little attention to emptying processes compared to filling processes....
- Autores:
- Tipo de recurso:
- Fecha de publicación:
- 2019
- Institución:
- Universidad Tecnológica de Bolívar
- Repositorio:
- Repositorio Institucional UTB
- Idioma:
- eng
- OAI Identifier:
- oai:repositorio.utb.edu.co:20.500.12585/9143
- Acceso en línea:
- https://hdl.handle.net/20.500.12585/9143
- Palabra clave:
- Air valve
Air–water
Entrapped air
Pipelines emptying
Transient flow
Water distribution networks
Pipelines
Water distribution systems
Air valves
Computational model
Entrapped airs
Pressure oscillation
Subatmospheric pressures
Transient flow
Transient phenomenon
Water distribution networks
Phase interfaces
Air-water interaction
Atmospheric pressure
Experimental study
Model validation
Pipe
Pipeline
Transient flow
- Rights
- restrictedAccess
- License
- http://creativecommons.org/licenses/by-nc-nd/4.0/
| Summary: | Emptying pipelines can be critical in many water distribution networks because subatmospheric pressure troughs could cause considerable damage to the system due to the expansion of entrapped air. Researchers have given relatively little attention to emptying processes compared to filling processes. The intricacy of computations of this phenomenon makes it difficult to predict the behaviour during emptying, and there are only a few reliable models in the literature. In this work, a computational model for simulating the transient phenomena in single pipes is proposed, and was validated using experimental results. The proposed model is based on a rigid column to analyse water movement, the air–water interface, and air pocket equations. Two practical cases were used to validate the model: (1) a single pipe with the upstream end closed, and (2) a single pipe with an air valve installed on the upstream end. The results show how the model accurately predicts the experimental data, including the pressure oscillation patterns and subatmospheric pressure troughs. © 2018, © 2018 International Association for Hydro-Environment Engineering and Research. |
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