Transient fluid flow in parallel pipeline designed of pipes with different materials

Abstract

Transient fluid flow and the occurrence of water hammer in their specifics include the conditions of the environment in which the flow takes place. The variety of pipeline construction material (steel, polyethylene or other material) defines the conditions for the development of water hammer. The construction of parallel hydraulically connected pipelines from different materials and mutual influence in the conditions of transient fluid flow conditions of operation is the subject of research in this paper. The research was performed numerically on long (line) pipelines. The AFT-Impulse software package was used, which had already been tested with comparative experimentally measured values. The analysis model considers pipelines made of steel and polyethylene material in parallel hydraulic connection. The results of the simulation conditions are given through comparative diagrams, where the interactive influence is clearly and unambiguously revealed. The conditions of exploitation and interactive influence are given in the commentary and conclusion of this paper.