两相速度平衡条件下的两相流声速

在两相速度平衡条件下,本文首先给出无相变的两相流中声速的一般表达式。再对相间传热作出热平衡或绝热假设,得到完全平衡的和部分平衡的声速的具体表达式。两相流(速度平衡的)声速的许多现有公式都可以作为特例从一般表达式中导出。本文还研究了相变对声速的影响,给出了一元两相系的和二元两相系的完全平衡(速度平衡、热平衡和相平衡)声速公式。

THE SPEED OF SOUND IN TWO-PHASE FLOWS UNDER THE CONDITION OF VELOCITY-EQUILIBRIUM BETWEEN PHASES

Under the condition of velocity-equilibrium between phases, a general expression for the speed of sound in two-phase flows without phase change has been obtained. After introducing an adiabatic or thermo-equilibrium assumption between phases, the expression reduces to a particular expression for the complete or partial equilibrium speed of sound. Various expressions for the velocity-equilibrium speed of sound in two-phase flows published in literature can be derived from the general expression as special examples. The influence of phase change on the speed of sound has been studied and the expressions for the complete (velocity-, thermo-and phase-) equilibrium speed of sound in a single-component, two-phase system and in a two-component, two-phase system have been derived.