A Numerical Exploration of Transient Decay Mechanisms in Water Distribution Systems - Advances in Control and Automation of Water Systems - page 20

figure 1.8 Scheme of the water hammer experimental equipment (a) Rasht city water
hammer Laboratory Model, (b) water hammer Laboratory Model with local leak.(Kodura and
Weinerowska)
1.3.2.4 Experimental Equipments and Conditions
Experiments were carried out in the laboratory of Warsa, University of Technology,
Environmental Engineering Faculty, Institute of Water Supply and Water Engineering.
(Figure 1.8b)
The physical model is schematically shown in (Figure 1.8b) .The main element
was the pipeline (single straight pipe of the length L, extrinsic diameter D, and the
wall thickness e or the pipeline consisted of sections of varied parameters. The pipe-
line was equipped with the valve at the end of the main pipe, which was joined with
the closure time register. The water hammer pressure characteristics were measured
by extensometers, and recorded in computer's memory. The supply of the water to the
system was realized with use of reservoir which enabled inlet pressure stabilization.
The experiments were carried out for four cases:
• simple positive water hammer for the straight pipeline of constant diameter;
the measured characteristics were the basis for estimation the influence of the
diameter change and local leak on water hammer run.