WITHDRAWN: Viscoelastic loop strategy for water hammer control in a pressurized steel pipeline

Abstract

Abstract The challenges of water hammer phenomenon impose many technical and economic barriers to the design and operation of the pressurized hydraulic systems. So the objective of most literature in this field was finding an applicable strategy that was capable to suppress the threatening of hydraulic transient and fulfill the required technical and economic limits of the project. In this paper, an experimental investigation is presented to verify the effectiveness of the viscoelastic loop strategy to control and damp the water hammer triggered in the pressurized pipeline due to pump’s trip or downstream valve closure. This strategy comprises two viscoelastic bypass pipes are configured to form a counter clockwise loop that allow to the flow in certain direction and restrain its opposite one. On the other hand, the performance of viscoelastic loop strategy is compared to the classical air vessel device to control the induced hydraulic transients. Further, the experimental results revealed the viscoelastic loop strategy is very effective to control the water hammer with overall maximum pressure damping efficiency reaches to (69.5%). Furthermore, the viscoelastic loop strategy is superior to the classical air vessel device for different transients trigger conditions in the most cases of the experiments.