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Acta Mechanica Sinica

, Volume 2, Issue 3, pp 206–219 | Cite as

Precursor vacuum-ultraviolet radiation ahead of strong shock waves in a shock tube

  • Cui Jiping
  • Fan Bingcheng
  • He Yuzhong
Article

Abstract

The profile and excitation mechanism of vacuum-ultraviolet radiation emitted from shock wave is investigated in a shock tube. For shock wave in argon, the rdiation is due to resonant transition excited by argon-argon collision in the shock front with excitation cross section coefficientS *=1.0×10−17 cm2·ev−1 and activation energyE *=11.4 ev. For shock wave in air the radition is emitted from a very thin shock layer in which the mechanism ofX 1∑→b 1∑ of N2 is excited with excitation cross sectionQ=2×10−16cm2 and activation energyE *=12.1 ev.

Key Words

shock wave precursor phenomena high temperature gases vaccum ultraviolet radiation excitation cross section 

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Copyright information

© Chinese Society of Theoretical and Applied Mechanics 1986

Authors and Affiliations

  • Cui Jiping
  • Fan Bingcheng
  • He Yuzhong

There are no affiliations available

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