Numerical modeling of transient flows in load pipes with complex geometry

• Autorzy: Ramoul S. , Fourar A. , Massouh F.

Identyfikatory

DOI

10.17512/jamcm.2017.4.07

• Języki publikacji: EN

Abstrakty

EN

Changes in the system flow of a fluid in a pipe often cause sudden pressure changes and give rise to so-called transient load flows. So, the study of the phenomenon of transient load flows aims to determine whether the pressure in the whole of a system is within the prescribed limits, following a perturbation of the flow. By defining the scope of a water hammer study, an examination is made of variations in velocity or flow and pressure resulting from poor operation of the hydraulic system, its normal operation and emergency operations. This paper introduces a numerical modeling of the phenomenon of transient flows in load pipes with variable geometries which presents a study of the average pressure and the average velocity of the transient flow in the pipe with quasi-steady term friction. The characteristic method is used to solve the governing equations of “Saint-Venant”. Thanks to the AFT Impulse industrial program, we have obtained very interesting and very practical numerical results to describe the phenomenon of transient flows in variable load pipes.

Słowa kluczowe

EN

numerical modelling; transient flow; water hammer; characteristic method; AFT impulse software

PL

mechanika płynów; przepływ przejściowy; młot wodny

• Wydawca: Wydawnictwo Politechniki Częstochowskiej
• Czasopismo: Journal of Applied Mathematics and Computational Mechanics
• Rocznik: 2017
• Tom: Vol. 16, nr 4
• Strony: 67--78
• Opis fizyczny: Bibliogr. 11 poz., rys., tab.

Twórcy

autor

Ramoul S.

• Faculty of Technology Hydraulics Department University of Batna2, Algeria

autor

Fourar A.

• Faculty of Technology Hydraulics Department University of Batna2, Algeria

autor

Massouh F.

• Laboratory of Fluid Mechanics at ENSAM, Paris, France

Bibliografia

• [1] Salah B., Kettab A., Massouh F., Bangangoye B., Célérité de l’onde de coup de bélier dans les réseaux enterrés, revue la Houille Blanche 2001, 3/4.
• [2] Elaoud S., Hadj-Taďeb E., Influence of pump starting times on transient flows in pipes, Nuclear Engineering and Design 2011, 241, 3624-3631.
• [3] Blommaert G., Étude du comportement dynamique des turbines francis, contrôle actif de leur stabilité de fonctionnement, Ph.D. thesis, Polytechnical School Fédérale de Lausanne 2000.
• [4] Allevi L., Theorie general du movement varie de l’eau dans les tuyaux de conduit, Revue of Mechanics, Paris, France 1904, 14, 10-22 and 230-259.
• [5] Allevi L., Colpo d’ariete e la regolazione delle turbine, Electtrotecnica 1932, 19, 146.
• [6] Bertgeron L., Etude des variations de regime dans les conduits d’eau, Solution graphique generale, General Revue of Hydraulic 1935, 1, 12-69.
• [7] Bergeron L., Etude des coups de belier dans les conduites, nouvel exose’ de la methode grphique, Revue La Technique Moderne 1936, 28, 33-75.
• [8] Simpson A.R., Wu Z.Y., Computer Modelling of Hydraulic Transient in Pipe Networks and Associated Design Criteria. MODSIM97, International Congress on Modelling and Simulation, Modelling and Simulation Society of Australia, Hobart, Tasmania, Australia, 1997.
• [9] Vaillant Y., Simulation du comportement transitoire de turbine Kalpan, Travail pratique de Master EPFL, Lausanne 2005, 85.
• [10] Abuaziah I., Oulhaj A., Sebari K., Abbassi Saber A., Ouazar D., Shakameh N., Modeling and Controlling Flow Transient in Pipeline Systems, Rev. Mar. Sci. Agron. Vét. 2013, 3, 12-18.
• [11] Siamao M., Mechanical interaction in pressurized pipe systems: experiments and numerical models, Journal of Water, Miklas scholz 2015, 7, 63261-6350.

Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).