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RESEARCH PAPERS: Heat Transfer in Manufacturing

Modeling of Nitrogen and Oxygen Recombination on Partial Catalytic Surfaces

[+] Author and Article Information
O. Deutschmann, U. Riedel, J. Warnatz

Institut für Technische Verbrennung, Universität Stuttgart, 70550 Stuttgart, Federal Republic of Germany

J. Heat Transfer 117(2), 495-501 (May 01, 1995) (7 pages) doi:10.1115/1.2822549 History: Received September 01, 1993; Revised May 01, 1994; Online December 05, 2007

Abstract

In connection with recombination coefficients derived from experimental data described in the literature, a reaction scheme including detailed rate expressions for O and N atom recombination on the surface of re-entry vehicles is established, consisting of elementary reaction steps. To validate the reaction mechanism derived, surface chemistry and fluid mechanical processes are coupled assuming a one-dimensional stagnation flow field. A quantitative agreement is achieved between recombination coefficients resulting from the numerical computations and those calculated from experiments. The temperature dependence of the recombination coefficient is explained by elementary reaction steps. Furthermore, the reaction scheme established is implemented in a two-dimensional Navier–Stokes code computing the re-entry flow around a simple geometry to show the importance of a detailed modeling of surface reactions.

Copyright © 1995 by The American Society of Mechanical Engineers
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