Определение кинетических констант гетерогенного окисления углерода на сублимационном режиме его абляции по результатам суммарных абляционных экспериментов

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Defining the kinetic constants of heterogeneous carbon oxidation…
Engineering Journal: Science and Innovation # 12·2017 13
Defining the kinetic constants of heterogeneous carbon
oxidation under the sublimational condition
of its ablation according to the results
of the combined ablative experiments
© V.V. Gorskiy1, 2, A.A. Dmitrieva1
1Joint Stock Company MIC Mashinostroyenia, Reutov, 143966, Russia
2Bauman Moscow State Technical University, Moscow, 105005, Russia
Nowadays carbon-based materials are widely used in the ablating shell structures ap-
plied in the rocket and space equipment. In this regard, the analysis of their thermochem-
ical destruction, including the destruction under high-temperature exposure (sublima-
tional condition), is essential. It is very expensive and in many cases impossible to
conduct full-scale experiments in order to obtain the data concerning the behaviour of
the material in the particular conditions. The bench scale testing resulting in the reloca-
tion to the full-scale conditions is an alternative way of studying the mechanism of the
carbon-based materials destruction. We introduce a full-scale ablation experiments
framework for the dense of carbon material. The article describes a theoretically-
calculated model of the carbon ablation determined by the process of the material heter-
ogeneous oxidation under sublimational condition. We present a strategy for defining the
kinetic constants comprised into the accepted ablation model and an example of solving
the optimization problem of defining the kinetic constants of the carbon heterogeneous
oxidation. The proposed strategy allows determining the characteristics of carbon de-
struction due to its heterogeneous oxidation under sublimational condition that can be
used for forecasting the burn of the rocket and space equipment thermal-protective coat-
ing when it is exploited in the presence of oxygen under the impact of high temperatures.
Keywords: carbon, ablation, oxidation, kinetic constants, Arrhenius law
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DOI: 10.2514/1.T4752
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