THE OUTFLOW OF BOILING LIQUID FROM TUBULAR CHANNELS

The problems of draining of tubular channels with boiling liquid are t reated, as well as those of the outflow of a vapor-liquid system from a large container through a tubular nozzle. A barotropic equation of s tate is proposed for the adiabatic and equilibrium flow of boiling liq uid. The critical conditions are defined, which separate the initial s tage, when the draining intensity is defined by purely gasdynamic phen omena (the inertial effects and the process of adiabatic expansion), f rom the subsequent stage, when the inertia is inessential. For two lim iting outflow regimes, when the hydraulic friction force depends on th e flow velocity linearly and under the square law, the system of equat ions of motion reduces to one nonlinear equation. Self-similar solutio ns are constructed for the problem on sudden depressurization of a cha nnel at its one end. Solutions are also derived describing the steady outflow of boiling liquid through cylindrical nozzles.