Cálculo de la velocidad de onda para el análisis del golpe de ariete

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Análisis del flujo transiente usando el método de las características con esquema de interpolación de cinco puntos Fecha de entrega: 25 de agosto 2017 Fecha de aceptación: 21 de agosto 2018An original 2 nd -order Method of Characteristics (MOC) which it works with a five-point interpolating scheme valid for solving the hyperbolic and quasilinear partial differential equations that describe the transient flow phenomenon in pipelines is shown. The results obtained by both MOC 2 nd -order and exact solution (MOC 1 st -order) are compared. It is shown that MOC 2 nd -order allows obtain near-to-exact results within a wide range of Courant numbers. Keywords: artificial viscosity, Courant number, method of characteristics 2 nd -order, water hammerSe muestra una versión original del Método de las Características (MC) de 2 do orden que trabaja con un esquema de interpolación de cinco puntos, válido para resolver las ecuaciones diferenciales parciales hiperbólicas y cuasilineales que describen el fenómeno del flujo transiente en redes de tuberías. Se comparan los resultados obtenidos por el MC 2 do orden y la solución exacta (MC 1 er orden). Se demuestra que el MC 2 do orden permite obtener resultados cercanos a los exactos dentro de una amplia gama de números de Courant.Palabras clave: viscosidad artificial, número de Courant, método de las características 2 do orden, golpe de ariete

Water hammer in pipe networks is a subject little discussed in the technical literature. This may be due to the belief that the network shape helps to reduce its impact, since the pressure waves would tend to subdivide as they propagate through the system pipes. In this article the water hammer is analysed in a pipe network due to the closure of a valve modelled how if it were of type butterfly, gate circular, gate square, ball, needle and globe. It is concluded that the extreme pressure values depend on the type of valve which it is being closed, and that the network shape is not a relevant factor that it helps to attenuate the transient pressures.

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