Journal of Materials and Engineering Structures
Volume 10, Numéro 3, Pages 477-489
2023-09-30
Analysis Of Water Hammer In A Penstock In The Case Of Valve Closure. Part 3: Pressure Losses Concentrated Upstream
Authors : Hammoum Hocine . Yahiaoui Akli . Achour Bachir .
Abstract
In this third contribution, still using the same analytical approach based on Bergeron's graphical construction as in the first two parts [1, 2], we analyze the water hammer phenomenon induced by the slow closing of a valve by considering pressure losses concentrated upstream of the penstock, just at the outlet of the reservoir. The analytical equations governing the propagation of the elastic waves in charge are thus developed. The same practical example studied during our first two contributions is analyzed here and the results, flow rates and pressures at the level of the valve and the tank at different times, are compared with those obtained, by considering respectively the negligible pressure drops then concentrated downstream of the pipe, just at the inlet of the shut-off valve.
Keywords
Diagram of Bergeron ; Water hammer ; Pressure losses ; Closing valve
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