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Oxidation Behavior of Aerospace Materials in High Enthalpy Flows Using an Oxyacetylene Torch Facility
Author(s) -
MillerOana Melia,
Neff Paul,
Valdez Mario,
Powell Amber,
Packard Matthew,
Walker Luke S.,
Corral Erica L.
Publication year - 2015
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.13462
Subject(s) - torch , heat flux , graphite , materials science , ceramic , enthalpy , combustion , composite material , flux (metallurgy) , thermodynamics , chemistry , heat transfer , metallurgy , physics , welding
The oxyacetylene torch facility is used to measure the ablation rates of graphite and the surface temperatures of different aerospace materials. The free‐stream flame environment is characterized as a function of flame chemistry for heat flux, pO 2 , and flow velocity. Measured ablation rates for graphite increase as a function of increasing heat flux and pO 2 , which are validated by applying an oxygen diffusion based model. The model uses experimentally measured values for temperature, pO 2 , and gas velocity in order to confirm torch testing results are reliable and reproducible. Surface temperatures of ultra‐high temperature ceramic composites are measured as a function of increasing heat flux and show an enthalpic cooling effect on the flame during oxidation testing.