Numerical study of gas-dynamic and condensation processes in an ejector device used to purify gas-air emissions

Abstract

The article presents a numerical study of vapor condensation appearing in an ejector. The ejector is a part of a device developed by the authors and used to purify air emissions. The article considers condensation of pure water vapor and condensation of vapor in a mixture of vapor and carrier gas. The system of axisymmetric Navier-Stokes equations and the system of moment equations are considered as a mathematical model for describing two-dimensional non-stationary gas-dynamic processes and processes of phase transitions in the device. The general system of equations is numerically solved using the finite volume method.

Application of the Moment Method for Numerical Simulation of Homogeneous-Heterogeneous Condensation

“…The system of Equations ( 1)-( 14) is solved by means of the numerical method [23][24][25]. It is based on the Godunov high-resolution method and uses the MUSCL approach to improve the spatial accuracy of the method.…”

“…In recent years, the problems of the numerical modeling of homogeneous [18][19][20][21][22][23][24][25] and heterogeneous condensation [26][27][28] have been actively studied. The problem of the joint occurrence of heterogeneous and homogeneous nucleation in solutions and melts was considered in [29], and in gas mixtures in [30].…”