封闭空间中易燃混合气体在HF和CO<sub>2</sub>激光作用下的燃烧引发

FIRSOV K N; KAZANTSEV S Yu; KONONOV I G; KOSSYI I A; TARASOVA N M; 张来明; 谢冀江

Volume 4 Issue 1

Feb. 2011

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Chinese Optics > 2011 > 4(1): 41-45.

FIRSOV K N, KAZANTSEV S Yu, KONONOV I G, KOSSYI I A, TARASOVA N M, ZHANG Lai-ming, XIE Ji-jiang. Combustion initiation of flammable gas mixture in a closed volume by high power HF and CO2 laser[J]. Chinese Optics, 2011, 4(1): 41-45.

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Combustion initiation of flammable gas mixture in a closed volume by high power HF and CO₂ laser

1.
Prokhorov General Physics Institute,Russion Academy of Sciences,Moscow 119991,Russia;
2.
Stake Key Laboratory of Laser Interaction with Matter,Changchun Institute of Optics, Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China

Received Date: 21 Sep 2010
Rev Recd Date: 03 Dec 2010
Publish Date: 25 Feb 2011

Abstract

Abstract

The ignition of stoichiometric CH4∶ O2 mixture in a closed cylindrical quartz chamber was investigated. Two methods of combustion initiation were used:mixture ignition by freely localized pulse HF laser produced laser spark and mixture ignition by direct gas heating with the help of a pulse CO2 laser. In the latter case, the small admixture of SF6 strongly absorbing CO2 laser radiation was used for pulse heating of flammable mixture. Dynamics of combustion was investigated and the spectral characteristics of combustion glow were determined. The experiment demonstrates that rapid laser heating of a certain amount of reactive gas can significantly accelerate the process of inflammation and can realize the detonation mode of combustion gas mixture, even in a small reactor volume. Initial gas temperature distributions along chamber axis for threshold conditions are obtained.
- cylindrical quartz chamber,
- combustion initiation mode,
- pulse HF laser,
- CO2 laser radiation,
- spectral characteristics,
- temperature distribution

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References(1)

References

[1] KAZANTSEV S Yu,KONONOV I G,KOSSYI I A,et al.. Ignition of a combustible gas mixture by a laser spark excited in the reactor volume plasma[J]. Plasma Phys. Rep.,2009,35:251-257. [2] BEDUNEAU J-L,KIM B,ZIMMER L,et al.. Measurements of minimum ignition energy in premixed laminar methane/air flow by using laser induced spark[J]. Combust. Flame,2003,132:653-655. [3] BELEVTSEV A A,FIRSOV K N,KAZANTSEV S Yu,et al.. Self-sustained volume discharge in SF₆-based gas mixtures upon the development of shock-wave perturbations of the medium initiated by a pulsed CO₂ laser[J]. Quantum Electron.,2006,36:646-652. [4] ANDREEV S N,FIRSOV K N,KAZANTSEV S Yu,et al.. Temporal structure of an electric signal produced upon interaction of radiation from a HF laser with the bottom surface of a water column[J]. Quantum Electron.,2009,39:179-184. [5] BELEVTSEV A A,FIRSOV K N,KAZANTSEV S Yu,et al.. The influence of vibrational excitation on the burning voltage of a pulsed electric discharge in HF laser working media[J]. Appl. Phys. B,2006,82:455-462. [6] BRATOV V A,ISAKOV L M,PETROV Yu V. A criterion for detonation initiation in gas mixtures[J]. Physics-Doklady,2008,53:507-509.

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