Interaction of pressure waves with an obstacle at the breakup in the pipeline with superheated water

About the authors:

Maksim V. Alekseev, Cand. Sci. (Phys-Math.), Senior Research Associate, Kutateladze Institute of Thermophysics of the Siberian Branch of the Russian Academy of Sciences (Novosibirsk); alekseev@itp.nsc.ru

Ivan S. Vozhakov, Cand. Sci. (Phys.-Math.), Senior Researcher, Kutateladze Institute of Thermophysics of the Siberian Branch of the Russian Academy of Sciences (Novosibirsk); vozhakov@gmail.com

Abstract:

The numerical simulation of the coolant outflow at high pressure pipe break is performed, and the interaction of the compression wave with an obstacle is described. The calculated results on the dynamics of the axial pressure profile and the pressure at the center of the target are presented. It is demonstrated that the shape of the radial pressure profile on the target is presented as a “disc-shaped” profile with local peaks at the edges. It is found that in the case of two-phase outflowing coolant the calculated pressure of the wave reflected from the obstacle near the nozzle is less than the theoretical predictions for an ideal gas. With increasing the distance from the nozzle to the obstacle, the differences between the calculated and theoretical values decrease.

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