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Modeling of the turbulent flow and conjugated heat and mass transfer in quickly proceeding non-stationary processes of functioning of impulse action systems

DOI: 10.1615/ICHMT.2009.TurbulHeatMassTransf.290
12 pages

Sergey Kharlamov
Tomsk State University, Tomsk Polytechnic University

A. Rudatchenko
Department of Oil & Gas Transportation and Storage, Tomsk Polytechnic University, 30, Lenin av., Tomsk 634050, Russia

Résumé

The results of numerical investigation of turbulent heat and mass transfer of thermally dissociated and ionized mixture of gases are presented in the chamber behind the accelerated piston. It is used the low-Reynolds turbulent model for Reynolds shear stresses and scalar fluxes considering thermal and dynamic inertia of a working mixture, non-stationary of changing of turbulent structure, interference of chemical reactions and turbulence. For unknown terms of higher order the modeling closures are written originally in view of wall effects. It permits to accomplish the calculations in total flow field up to the chamber wall, including the laminar sublayer and the buffer zone. The flow features connected with the influence of chemical reactions, non-stationary heat transfer are analyzed in detail. It is established that in the given conditions the chemical reactions are capable to intensify essentially transport processes in the chamber.

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