Experimental and numerical investigation of catalytic efficiency of atomic oxygen recombination on TPS surfaces

Hiroshi Osawa, Toshiyuki Suzuki, Hiroki Takayanagi, Masahito Mizuno, Kazuhisa Fujita, Keisuke Sawada

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)

Abstract

The catalytic efficiency of atomic oxygen recombination on silicon carbide is evaluated in the surface temperature range from 300 to 1450 K at the total pressure of 11 Pa by experimental and numerical approaches. In the experiment, the oxygen-argon inductively coupled plasma test flow is generated, and the spatial distribution of emission intensities of atomic oxygen and argon is obtained by optical emission spectroscopy. From the obtained results, the catalytic efficiency is evaluated by actinometry. It is found that the catalytic efficiency increases as the surface temperature increases and the total pressure decreases. Furthermore, the thermochemical nonequilibrium computational fluid dynamics simulation considering the simple catalytic recombination process based on the kinetic theory is carried out to reproduce the flowfield in the test chamber. It is found that the measured emission intensity ratio is reproduced by slightly changing the experimentally deduced catalytic efficiency value. The uncertainties in the results are discussed, and improvements are proposed.

Original languageEnglish
Title of host publication41st AIAA Thermophysics Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
ISBN (Print)9781563479755
DOIs
Publication statusPublished - 2009 Jan 1

Publication series

Name41st AIAA Thermophysics Conference

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Aerospace Engineering
  • Mechanical Engineering

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