Abstract
This paper considers the axisymmetric problem of condensation at a boiling liquid outflow in a closed region filled with steam. It has been found that the unsteady condensation is due to the formation of a complex structure of lateral pressure surges, Mach disk, barrel shocks and a wall, on which the pressure exceeds the local saturation pressure.
Highlights
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
There was no reflection of pressure waves and the pressure in the outer region did not rise above the local saturation pressure
Description of the phase transition requires the use of: the model based on processing the experimental data on relaxation time "nonequilibrium - equilibrium boiling" [4], thermodynamically equilibrium model and analytical relaxation model proposed in [5] and based on the
Summary
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. There was no reflection of pressure waves and the pressure in the outer region did not rise above the local saturation pressure. The aim of this work is to study the effect of a closed region filled with steam on the condensation process in the outer region of the boiling jet
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