Parameters affecting water hammer in metal pipelines

The Effect of Water Hammer on Pressure Increases in Pipelines Protected by an Air Vessel

Original scientific paper In the pipelines of water supply systems, the water hammer phenomenon often arises during rapid unsteady developments. Pipelines are mostly protected using an air vessel, which is designed by means of equations for oscillations of water mass. In this study, an analysis is made of the impact of pressure increases caused by water hammer on pressure variations in pipeline...

Optimal Boundary Control for Water Hammer Suppression in Fluid Transmission Pipelines

When fluid flow in a pipeline is suddenly halted, a pressure surge or wave is created within the pipeline. This phenomenon, called water hammer, can cause major damage to pipelines, including pipeline ruptures. In this paper, we model the problem of mitigating water hammer during valve closure by an optimal boundary control problem involving a nonlinear hyperbolic PDE system that describes the ...

Hammer Impact Test Applied for Fouling Detection in Pipelines

Teste de Impacto do Martelo aplicado na Detecção de Incrustação em Tubulações A detecção da incrustação em sistemas de dutos é um problema persistente e requer uma demanda pertinente para as indústrias qúımicas, petroĺıferas, aliment́ıcias e farmacêuticas. A incrustação é um processo de deposição de materiais sólidos dissolvidos orgânicos e outros materiais pesados nos fluidos transportados ou e...

Water Hammer with Column Separation:

Column separation refers to the breaking of liquid columns in fully filled pipelines. This may occur in a water hammer event when the pressure drops to the vapor pressure at specific locations such as closed ends, high points or knees (changes in pipe slope). A vapor cavity, driven by the inertia of the parting liquid columns, will start to grow. The cavity acts as a vacuum, a low-pressure poin...

Water hammer dissipation in pneumatic slug tests