Numerical investigation of water hammer effect in pipeline of NPP considering two-phase compressible flow

Zhang, Yu; Xi, Zhide; Sun, Lei

doi:10.1016/j.pnucene.2022.104287

Cited by 5 publications

(1 citation statement)

References 15 publications

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“…It is well known that severe pressure changes can cause significant harm to the pipes or connected equipment, leading to high repair costs and even safety hazards. Thus, the topic of water hammer control is relevant to many technical fields such as water supply systems [2] and the circuits of nuclear power plants [3] or hydropower units [4]. In recent years, various water hammer control methods have been developed to minimise the risk of damage and improve the safety of pressurised pipeline systems.…”

Section: Introductionmentioning

confidence: 99%

Water hammer mitigation by internal rubber hose

Kubrak

2024

Archives of Civil Engineering

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The aim of this research was to experimentally analyse the possibility of using a rubber hose placed inside a pipeline to mitigate the water hammer phenomenon. The experiments were conducted using a steel pipeline with an inner diameter of 53 mm and an EPDM rubber hose with a diameter of 6 mm. Hydraulic transients were induced by a rapid closure of the valve located at the downstream end of the pipeline system. In order to analyse the influence of steady-state flow conditions on the maximum pressure increase, measurements were carried out for different values of initial pressure and discharge. The experimental results indicate that placing a rubber hose inside a pipeline can substantially attenuate valve-induced pressure oscillations. It was observed that the initial pressure has a significant influence on the capacity of the rubber hose to dampen the water hammer phenomenon. Comparative numerical calculations were performed using the Brunone–Vitkovský instant acceleration-based model of unsteady friction. It was demonstrated that this approach does not allow satisfactory reproduction of the observed pressure oscillations due to the viscoelastic properties of the EPDM hose used in the tests.

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Section: Introductionmentioning

confidence: 99%