Peculiarities of evolution of shock waves generated by boiling coolant

Simulating the boiling fluid outflow taking into account external condensation

“…The problem is solved using the computational complex LСPFCT [7]. A detailed description of the physical model is presented in [1,2,5]. Fig.…”

“…When depressurizing tanks and pipelines of power plants filled with water under high pressure, superheated water is released with a sharp decrease in pressure in the rupture zone, with the formation of a compression wave in the surrounding space and further formation of the boiling coolant jet. In previous works [1,2] the outflow was simulated into the area with free inflow-outflow at the boundaries. As a result, there was no reflection of pressure waves and the pressure in the outer region did not rise above the local saturation pressure.…”

Modeling the outflow of liquid with initial supercritical parameters using the relaxation model for condensation

“…Such a sharp decrease in pressure leads to a generation of compression waves in the area around the separation zone and further formation of the jet of the boiling coolant [1]. If in the stationary mode both pressure and temperature are supercritical (p > p CR , T > T CR ), it is possible for fluid parameters to approach the binodal (boundary of "single-phase and two -phase" region) from the condensation curve [2].…”