Experimental and numerical study of pyrolysis gas pressure in ablating test piece

Toshiyuki Suzuki, Keisuke Sawada, Tetsuya Yamada, Yoshifumi Inatani

研究成果: Article査読

30 被引用数 (Scopus)

抄録

The pyrolysis gas pressure and temperature inside ablator pieces are measured in an arc-heated wind tunnel. The obtained pressure and temperature data are compared with the computed results that account for unsteady ablation. In the calculation, the motion of pyrolysis gas is determined by solving the mass and momentum conservation equations assuming a finite permeability determined in our previous study. Though a quantitative agreement is not yet reached, the observed trend in pressure showing an initial increase, a decrease, and eventually reaching a plateau is reproduced qualitatively by the present calculation. It is suggested from the experimental data and the computed result that delamination of the ablator likely occurs at the region where the ablator is not fully charred but partially pyrolyzed, which results in a smaller porosity and higher pyrolysis gas pressure in the region.

本文言語English
ページ(範囲)266-272
ページ数7
ジャーナルJournal of thermophysics and heat transfer
19
3
DOI
出版ステータスPublished - 2005

ASJC Scopus subject areas

  • 凝縮系物理学
  • 航空宇宙工学
  • 機械工学
  • 流体および伝熱
  • 宇宙惑星科学

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