Chapter 29. Oxidation Behavior of a Partially Protected C/C Composite in a Hypersonic Flow

  1. John B. Wachtman Jr
  1. J. Talandier,
  2. O. Sudre and
  3. J.-M. Dorvaux

Published Online: 26 MAR 2008

DOI: 10.1002/9780470314715.ch29

Proceedings of the 19th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - A: Ceramic Engineering and Science Proceedings, Volume 16, Issue 4

Proceedings of the 19th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - A: Ceramic Engineering and Science Proceedings, Volume 16, Issue 4

How to Cite

Talandier, J., Sudre, O. and Dorvaux, J.-M. (1995) Oxidation Behavior of a Partially Protected C/C Composite in a Hypersonic Flow, in Proceedings of the 19th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - A: Ceramic Engineering and Science Proceedings, Volume 16, Issue 4 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314715.ch29

Author Information

  1. ONERA, CMtillon, France

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1995

ISBN Information

Print ISBN: 9780470375372

Online ISBN: 9780470314715

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Keywords:

  • hypersonic;
  • porous;
  • simultaneously;
  • catalytic;
  • spallation

Summary

The interaction between a hypersonic flow and a partially protected C/C composite during the reentry of the Hermes space plane was investigated. The composite was represented by a porous carbon structure protected with a non-oxidative cracked coating. The internal degradation of the composite was a function of the conditions in the hypersonic boundary layer, the microstructure, the gas-gas and gas-solid reaction kinetics and the gas flow dynamics. The novel approach of the model was to take into account both the governing equations of the hypersonic boundary layer flow and those of the internal gas flow to simultaneously solve a single set of equations. In addition, the atomic recombinations were considered in the gas flows and at the catalytic surfaces both above and within the composite. The two main results are discussed: (1) the weak influence of the composite oxidation on the gas composition in the boundary layer, and (2) the strong effect of the catalytic activity at the internal and external surfaces on the degradation of the composite. A case of coating spallation is also simulated.