Dynamics of pyrolysis gas in charring materials ablation

Hyo Keun Ahn, Chul Park, Keisuke Sawada

Research output: Contribution to conferencePaperpeer-review

20 Citations (Scopus)

Abstract

The ablation phenomenon of a charring heatshield material is calculated accounting for the heat absorption by the pyrolysis gas during its travel through the char. The motion of the pyrolysis gas is calculated by solving the equations for conservation of its mass and momentum. The method shows that cooling by the pysolysis gas is substantial. The method is validated by comparing with the experimental data obtained in an arc-jet wind tunnel. The method is applied for the heating and ablation of the Pioneer- Venus Probe vehicles in their stagnation region. A fair agreement is seen between the calculation and the flight data.

Original languageEnglish
DOIs
Publication statusPublished - 1998 Jan 1
Event36th AIAA Aerospace Sciences Meeting and Exhibit, 1998 - Reno, United States
Duration: 1998 Jan 121998 Jan 15

Other

Other36th AIAA Aerospace Sciences Meeting and Exhibit, 1998
Country/TerritoryUnited States
CityReno
Period98/1/1298/1/15

ASJC Scopus subject areas

  • Engineering(all)
  • Space and Planetary Science

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