Initiation of combustion and detonation by laser-induced electronical excitation of O2 molecules to the a1delta-g and b1-sigma-g+ states

Alexander M. Starik; Nataliya S. Titova

doi:10.1117/12.482135

13 September 2002 Initiation of combustion and detonation by laser-induced electronical excitation of O₂ molecules to the a¹Δg and b¹Σg⁺states

Alexander M. Starik, Nataliya S. Titova

Author Affiliations +

Proceedings Volume 4760, High-Power Laser Ablation IV; (2002) https://doi.org/10.1117/12.482135
Event: International Symposium on High-Power Laser Ablation 2002, 2002, Taos, New Mexico, United States

Abstract

On the basis of developed physical and mathematical model for thermal nonequilibrium chemical processes involving electronically excited molecules the analysis of the mechanisms resulting in initiation of combustion in closed reactor and detonation in supersonic flow behind inclined shock wave in H₂+O₂(air) mixtures at excitation of the (see paper for formula) states of oxygen molecules by resonant laser radiation with wavelengths (lambda) equals1.268 micrometers and 762 nm has been carried out. The numerical analysis has shown that induced by laser radiation excitation of O₂ molecules leads to significant decrease of the autoignition temperature and allows to initiate detonation at very low temperature (~500 K) behind shock wave at relatively small values of laser radiation intensity. Excitation of (see paper for formula) state by laser radiation is more effective to influence on combustion kinetics and initiation of detonation in supersonic flow.

Citation Download Citation

Alexander M. Starik and Nataliya S. Titova "Initiation of combustion and detonation by laser-induced electronical excitation of O₂ molecules to the a¹Δg and b¹Σg⁺states", Proc. SPIE 4760, High-Power Laser Ablation IV, (13 September 2002); https://doi.org/10.1117/12.482135

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