A Theoretical Approach to Two-Phase Critical Flow : (3rd Report, The Critical Condition Including Interphasic Slip)

Abstract

"Eigenvalue method", already proposed by the author for two-phase critical flow, is developed for the axial steady flow equations system where separate momentum conservation can be strictly postulated. Besides the comparisons of physical meanings in two-phase critical flow between energy and entropy, conservation equations are also investigated. The conclusions for steam water mixtures are as follows. (1) "Eigenvalue method"defines the criticality as the discontinuous condition of steady flow differential equations system and can treat easily such a complicated system composed of separate momentum between two phases, energy, and mass conservation equations. (2) The solutions given by the above theory can well explain the former empirical data except for critical slip ratio which has not well been investigated experimentally. (3) Critical condition with energy conservation gives a more accurate solution than one with entropy conservation. But the latter is still good approximation.