Simulation of RCC crack growth due to carbon oxidation in high-temperature gas environments

E. V. Titov, Jiaqiang Zhong, Deborah Levin Fliflet, Donald J. Picetti

Research output: Contribution to journalConference articlepeer-review

Abstract

High temperature gas dynamic computational techniques are employed to study microflows in expanding crack channels caused by the oxidation of the channel carbon walls. Wall regression rates for three reinforced carbon-carbon (RCC) samples that were tested in a high enthalpy arcjet environment were modeled. The test geometries and flow conditions span flow regimes from the transitional to the continuum, therefore kinetic (direct simulation Monte Carlo) and continuum (Navier-Stokes) gas dynamic approaches were used. The same mechanism for wall material loss, atomic oxygen reaction with bare carbon, was utilized in all three cases regardless of the computational techniques. The predicted wall regression rates were found to agree with arcjet measurements. Local gas flowfield results were found to affect the oxidation rate in a manner that cannot be predicted by previous mass loss correlations. The method holds promise for future modeling of materials gas-dynamic interactions for hypersonic flight.

Original languageEnglish (US)
Pages (from-to)965-971
Number of pages7
JournalAIP Conference Proceedings
Volume1084
StatePublished - Apr 13 2009
Externally publishedYes
Event26th International Symposium on Rarefied Gas Dynamics, RGD26 - Kyoto, Japan
Duration: Jul 20 2008Jul 25 2008

Keywords

  • Crack propagation
  • DSMC
  • Space shuttle
  • eDSMC

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Ecology
  • Plant Science
  • Physics and Astronomy(all)
  • Nature and Landscape Conservation

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