An accident involving a two-phase release can result in serious consequence
s for people as well as the environment. Consequently, tools are needed to
give accurate predictions of the discharge rate, physical state, compositio
n of released material, and chocked pressure in order to improve process sa
fety efficiency.
This paper discusses possible approaches to the examination of two-phase cr
itical releases and presents a slip equilibrium model which provides critic
al flow rate critical pressure, and phase function of the two phases emergi
ng from an accidentally broken pipe containing a liquefied gas mixture unde
r pressure.
Comparisons between experimental critical flow rates and model predictions
are favorable in both monocomponent and multicomponent mixtures.