Volume 4 Issue 1
Feb.  2011
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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.
Citation: 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.

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

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

     

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  • [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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