Chapter

Reactive Flows in the Dissipative Regime

Raymond Brun

in Introduction to Reactive Gas Dynamics

Published in print February 2009 | ISBN: 9780199552689
Published online May 2009 | e-ISBN: 9780191720277 | DOI: http://dx.doi.org/10.1093/acprof:oso/9780199552689.003.0012
 Reactive Flows in the Dissipative Regime

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This chapter examines reactive flows in dissipative regime in equilibrium and non-equilibrium conditions. It begins with a discussion of boundary layer flows, focusing on the influence of the chemical kinetics and of the wall catalycity on the wall heat transfer. Particular cases of vibrational non-equilibrium boundary layers are then examined, such as the boundary layer developing behind incident and reflected shock waves as well as along the walls of the divergent part of a supersonic nozzle. The results of computation of two-dimensional flows in nozzles and around various bodies are presented. The interaction between the non-equilibrium processes and the flow parameters is clearly emphasized. Similarly, an example of computation of a gasdynamic laser (CO2/N2) is presented. In the appendices, a few particular problems are examined, such as the vibrational catalycity, the use of the generalized Rankine-Hugoniot relations, the order of magnitude of transport terms, and a general view on the unsteady numerical methods used for solving Navier-Stokes equations in non-equilibrium conditions.

Keywords: dissipative flow; non-equilibrium flow; boundary layer; hypersonic nozzle; catalycity; gasdynamic laser; unsteady numerical method

Chapter.  9862 words.  Illustrated.

Subjects: Mathematical and Statistical Physics

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