The hydraulic impact and alleviation phenomena numeric modeling in the industrial pumped pipelines

The issues of the hydropercussion phenomena mathematical modeling in the industrial pumped piping systems, with the pumps and dampeners included, to determine the impact absorbers effectiveness on the amplitude-frequency charac-
teristics of these hydro-mechanical systems are considered. It’s still actual and many
authors are still looking for the systems CFD issues research and resolution, see [6,
7]. Method of calculating the transient and frequency characteristics of the pipeline
that contains a pump and a dampener, is based on nonlinear mathematical model. Simulation of overlapping stream with using industrial valves is provided by introducing the exponential law of diminishing cross-sectional area of the pipeline. The
basis of calculation is the method of characteristics applied to the simplified Navier-
Stokes equations.