Simulation of RCC Crack Growth Due to Carbon Oxidation in High-Temperature Gas Environments
- Author
- Titov, E. V.
- Published
- June 22, 2009.
- Physical Description
- 1 electronic document
- Additional Creators
- Anderson, Brian P., Picetti, Donald J., and Levin, D. A.
Online Version
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- Unclassified, Unlimited, Publicly available.
Free-to-read Unrestricted online access - Summary
- The carbon wall oxidation technique coupled with a CFD technique was employed to study the flow in the expanding crack channel caused by the oxidation of the channel carbon walls. The recessing 3D surface morphing procedure was developed and tested in comparison with the arcjet experimental results. The multi-block structured adaptive meshing was used to model the computational domain changes due to the wall recession. Wall regression rates for a reinforced carbon-carbon (RCC) samples, that were tested in a high enthalpy arcjet environment, were computationally obtained and used to assess the channel expansion. The test geometry and flow conditions render the flow regime as the transitional to continuum, therefore Navier-Stokes gas dynamic approach with the temperature jump and velocity slip correction to the boundary conditions was used. The modeled mechanism for wall material loss was atomic oxygen reaction with bare carbon. The predicted channel growth was found to agree with arcjet observations. Local gas flow field 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.
- Other Subject(s)
- Collection
- NASA Technical Reports Server (NTRS) Collection.
- Note
- Document ID: 20090022810.
JSC-CN-18365.
AIAA Thermophysics Conference; 22-25 Jun. 2009; San Antonio, TX; United States. - Terms of Use and Reproduction
- Copyright, Distribution as joint owner in the copyright.
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