Modeling the propagation of liquid droplets in a two-phase wall jet injected through an annular gap into a heated co-current turbulent airflow
M.A. Pakhomov1, V.I. Terekhov1, D.H. Kong2
1Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russia
2Xi'an Jiaotong University, Xi'an, China
Keywords: numerical modeling, Reynolds stress transport model, injection, wall gas-droplet jet, droplet dynamics and evaporation
Abstract
The dynamics of dispersed phase propagation during injection of a gas-droplet wall jet into a co-current turbulent heated airflow is numerically simulated with variations in the droplet mass concentration at the inlet cross-section and their initial diameter. The solution is based on a system of axisymmetric Reynolds-averaged Navier-Stokes (RANS) equations, taking into account the two-phase character of the flow. The Eulerian approach is primarily used to describe the aerodynamics and heat and mass transfer in the gas and dispersed phases. The Lagrangian and full Lagrangian approaches are used in the study for additional verification of the developed mathematical model. A significant effect of the liquid mass concentration on the particle concentration profiles across the channel cross-section is demonstrated. The results obtained using the Eulerian and Lagrangian descriptions are compared. The applicability of both approaches for describing the dynamics and heat transfer of a two-phase wall jet is demonstrated (the difference between the two approaches does not exceed 15%).
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