Fluid-Structure Interaction in a Pipeline Embedded in Concrete During Water Hammer

Pipe vibration induced by water hammer frequently emerges in conveyance system, especially the hydropower plant or pumped storage power station with long diversion pipelines. This turn affects hydraulic pulsation so that undesired fluid-structure interaction (FSI) arises. In this research, attention is given to a pipeline embedded concrete. A six-equation model was derived describe fluid-pipe-concrete considering Poisson coupling and junction coupling. With elastic homogeneous hypotheses, an iterative approach proposed solve model, results were validated experiment classical water-hammer theory. Then dynamic FSI responses studied reservoir-pipe-valve physical system. Hydraulic pressure, pipe wall stress axial motion discussed respect different parameters of Results obtained two-equation four-equation show characteristics pressure wave separately without FSI.