Calculation of Nonequilibrium Radiation from a Blunt-Body Shock Layer

Takeharu Sakai, Keisuke Sawada

研究成果: Article査読

11 被引用数 (Scopus)

抄録

A numerical method is developed for calculating the radiating axisymmetric flowfield accounting for nonequilibrium thermochemistry. Solutions of the flow with radiation are obtained in a fully coupled manner using a fully implicit time-marching method through a full block-matrix inversion. The method is used in calculating the radiation from the blunt-body shock layer in both air and carbon-containing airflows. The calculated results are compared with the experimental data obtained in a ballistic range at flight speeds of up to 13.4 km/s. For aluminum models, which do not ablate, the experimentally observed spectral features are qualitatively reproduced by the calculation, which assumes the shock layer to contain only the air species. For polycarbonate models, which ablate, additionally carbonaceous species must be included in the calculation in order to bring about qualitative agreement. Quantitative agreement is obtained for the ablating models only by accounting additionally for a blackbody radiation, produced possibly by spalled carbon particles.

本文言語English
ページ(範囲)99-105
ページ数7
ジャーナルJournal of thermophysics and heat transfer
15
1
DOI
出版ステータスPublished - 2001

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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