Modeling the process of mixing a gas-droplet wall jet with a heated turbulent flow in a cylindrical channel
M.A. Pakhomov, V.I. Terekhov
Kutateladze Institute of Thermophysics SB RAS, Novosibirsk
Keywords: numerical modeling, Reynolds stress transport model, injection, wall gas-droplet jet, droplet evaporation, turbulence
Abstract
Numerical modeling of the local flow structure and mixing process during injection of a gas-droplet wall jet into a turbulent heated air flow has been performed. The numerical solution is based on a system of axisymmetric Reynolds-averaged Navier-Stokes equations (RANS) taking into account the two-phase character of the flow. To describe the dynamics and heat and mass transfer in the dispersed phase, the Euler two-fluid approach is applied. A significant effect of the liquid mass concentration on the distribution of parameters over the channel cross-section and thermal efficiency is shown. An increase in thermal efficiency reaches 30% in the initial part of the channel and 200% in its end part in comparison with a single-phase wall air jet.
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