Combustion, Explosion and Shock Waves

, Volume 31, Issue 4, pp 432–436 | Cite as

Conditions for the excitation of a laminar kinetic singing flame

  • V. V. Afanas'ev
  • S. A. Abrukov
  • N. I. Kidin
  • A. K. Kuz'min
Article

Abstract

Experimental studies have been conducted of the concentration regimes of excitation and silence of acoustic instability of a laminar kinetic singing flame with changes in composition, flow rate, and initial temperature of a propane-air mixture. Measurements of the distribution intensity of the varying component of the emission of the CH radical at a wavelength of 4315 Å and of the phase difference between oscillations of pressure and of heat-release rate along the flame height have shown that the major portion of varying heat release for sustaining and amplifying pressure oscillations, in accordance with the Rayleigh criterion, occurs as a result of periodic changes in the surface area near the tip of the flame cone. A relation has been established between the change in the phase shift and the appearance of concentrational and temperature regions of excitation and silence of acoustic oscillations.

Keywords

Mechanical Engineer Phase Shift Temperature Region Heat Release Distribution Intensity 

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References

  1. 1.
    V. V. Afanas'ev, A. K. Kuz'min, and S. A. Abrukov, “Influence of the composition and temperature of the mixture on the excitation of a singing flame,” in:Combustion and Electrodynamic Phenomena [in Russian], Chuvash. Univ., Cheboksary (1990), pp. 14–19.Google Scholar
  2. 2.
    V. M. Sil'vestrov, V. A. Sklyar, and V. I. Furletov, “Possibility of applying the method of registration of CH and C radicals to the determination of the heat-release rate and composition of the mixture in a combustion chamber,” in:Combustion of Gases and Fossil Fuels [in Russian], Materials of the VI USSR Symp. on Combustion and Explosion, Inst. of Chem. Phys., USSR Acad. Sci., Chernogolovka (1980), pp. 114–118.Google Scholar
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    L. N. Khitrin,Physics of Combustion and Explosion [in Russian], Moscow Univ., Moscow (1957).Google Scholar

Copyright information

© Plenum Publishing Corporation 1996

Authors and Affiliations

  • V. V. Afanas'ev
  • S. A. Abrukov
  • N. I. Kidin
  • A. K. Kuz'min

There are no affiliations available

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