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Listar por palabra clave "Hydraulic transients"

Mostrando ítems 1-12 de 12

Analysis of hydraulic transients during pipeline filling processes with air valves in large-scale installations

Romero, Guillermo; Fuertes-Miquel, Vicente S.; Coronado-Hernández, Óscar E.; Ponz-Carcelén, Román; Biel-Sanchis, Francisco (Taylor & Francis, 2020-08-04)

[EN] During the filling process in pressurized hydraulic systems, sudden pressure changes generated inside the pipes can cause significant damage. To avoid these excessive overpressures, air valves should be installed to ...
Análisis de los transitorios hidráulicos generados durante los procesos de llenado y vaciado en instalaciones reales

Romero García-Consuegra, Guillermo (Universitat Politècnica de València, 2020-07-09)

[ES] Al realizar maniobras de llenado y de vaciado en los sistemas hidráulicos a presión, se generan en el interior de las tuberías unos cambios bruscos de presión que pueden provocar importantes daños. Para evitar alcanzar ...
Concerning dynamic effects in pipe systems with two-phase flows: pressure surges, cavitation and ventilation

Ramos, Helena M.; Fuertes-Miquel, Vicente S.; Tasca, Elias; Coronado-Hernández, Oscar E.; Besharat, Mohsen; Zhou, Ling; Karney, Bryan (MDPI AG, 2022-08)

[EN] The risks associated with unsteady two-phase flows in pressurized pipe systems must be considered both in system design and operation. To this end, this paper summarizes experimental tests and numerical analyses that ...
Detection of Abrupt Flow Discontinuities in Open-Surface Channels by Transient Analysis

Fanelli, Michele; Cabrera Marcet, Enrique (American Society of Civil Engineers, 2016-01)

From a linearized form of the equations of unsteady (transient) motion in an open channel of uniform cross section using the well-known technique of the characteristic lines, it is shown that under a set of not-too-restrictive ...
Effects of Orifice Sizes for Uncontrolled Filling Processes in Water Pipelines

Aguirre-Mendoza, Andrés M.; Paternina-Verona, Duban A.; Oyuela, Sebastián; Coronado-Hernández, Oscar E.; Besharat, Mohsen; Fuertes-Miquel, Vicente S.; Iglesias Rey, Pedro Luís; Ramos, Helena M. (MDPI AG, 2022-03)

[EN] The sizing of air valves during the air expulsion phase in rapid filling processes is crucial for design purposes. Mathematical models have been developed to simulate the behaviour of air valves during filling processes ...
Maniobras de llenado y vaciado en grandes conducciones. Aplicación a una tubería de fundición DN400 en Massamagrell (Valencia, España)

Romero, G.; Coronado-Hernández, O.E.; Fuertes-Miquel, V.S.; Ponz-Carcelén, R. (Universitat Politècnica de València, 2020-01-31)

[ES] Debido a las bolsas de aire que hay en el interior de las tuberías durante los procesos de llenado y vaciado, se producen depresiones o sobrepresiones en el interior de las mismas, capaces de producir serios daños en ...
Modelo numérico del proceso de llenado de una conducción simple con válvula de aire

Coronado-Hernández, Oscar Enrique; Fuertes-Miquel, Vicente S.; Besharat, Mohsen; Ramos, Helena M. (Associacao Portuguesa dos Recursos Hidricos, 2019-12)

[EN] Water filling processes in pipes generate overpressures that must be considered so that the facilities do not fail during their operation. The filling manoeuvres with air trapped in water pipes have been studied by ...
Módulo de cálculo para el posicionamiento, el dimensionamiento y la selección de ventosas y desagües en redes de abastecimiento

Grisales Morales, David Eduardo (Universitat Politècnica de València, 2021-11-15)

[ES] Las operaciones de llenado y vaciado, el aire disuelto bajo condiciones normales de operación de una conducción o las roturas, crean bolsas de aire que producen problemas críticos a lo largo de la conducción capaces ...
Pattern Recognition and Clustering of Transient Pressure Signals for Burst Location

Manzi, D.; Brentan, B. M.; Meirelles, G.; Izquierdo Sebastián, Joaquín; Luvizotto Jr., E. (MDPI AG, 2019-11)

[EN] A large volume of the water produced for public supply is lost in the systems between sources and consumers. An important-in many cases the greatest-fraction of these losses are physical losses, mainly related to leaks ...
Simplified Mathematical Model for Computing Draining Operations in Pipelines of Undulating Profiles with Vacuum Air Valves

Coronado-Hernández, Óscar E.; Fuertes-Miquel, Vicente S.; Quiñones-Bolaños, Edgar E.; Gatica, Gustavo; Coronado-Hernández, Jairo R. (MDPI AG, 2020-09)

[EN] The draining operation involves the presence of entrapped air pockets, which are expanded during the phenomenon occurrence generating drops of sub-atmospheric pressure pulses. Vacuum air valves should inject enough ...
Simulation of the turbines transient operation using the allevi program

Espert Alemany, Vicent B.; Koelle, Edmundo; Soriano Olivares, Javier; Cabrera Marcet, Enrique (ACTA Editora, 2014)

[EN] When designing hydroelectric power plants it is fundamental to simulate the system behavior in unsteady conditions following a total load rejection. The main objective of this simulation is to define wicket gates ...
Transient Phenomena Generated in Emptying Operations in Large-Scale Hydraulic Pipelines

Romero, Guillermo; Fuertes-Miquel, Vicente S.; Coronado-Hernández, Óscar E.; Ponz-Carcelén, Román; Biel Sanchis, Francisco (MDPI AG, 2020-08)

[EN] Air pockets generated during emptying operations in pressurized hydraulic systems cause significant pressure drops inside pipes. To avoid these sudden pressure changes, one of the most widely used methods involves the ...