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| 11. |
The Development of Pressure Induced Instabilities in Premixed Flames |
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Combustion Science and Technology,
Volume 99,
Issue 1-3,
1994,
Page 179-199
N. R. EDWARDS,
A. C. MclNTOSH,
J. BRINDLEY,
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PDF (542KB)
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摘要:
The development of disturbances to a plane, premixed flame front under the action of an externally imposed pressure gradient, has been studied numerically in two spatial demensions. The flow has been modelled well into the non-linear regime in which a thin spike of unburnt gas penetrates into the burnt region. Even though the length scales of the applied pressure disturbances considered are very large compared to the flame width, the results show that the dominant mechanism in the early stages is the Rayleigh-Taylor effect. Variations of Lewis number are found to have very little effect on the progress of the interaction. Changes in the flame Mach number and disturbance wavelength are also investigated.
ISSN:0010-2202
DOI:10.1080/00102209408935432
出版商:Taylor & Francis Group
年代:1994
数据来源: Taylor
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| 12. |
Nonlinear Oscillations of Premixed Flames Caused by Sharp Pressure Changes |
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Combustion Science and Technology,
Volume 99,
Issue 1-3,
1994,
Page 201-219
R. G. JOHNSON,
A. C. MclNTOSH,
G. A. BATLEY,
J. BRINDLEY,
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PDF (441KB)
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摘要:
Numerical investigations on the interactions of pressure waves with flames demonstrate that the pulsating instability can be excited by sharp changes in pressure. It is found that the frequency of oscillation is significantly altered by the amplitude of the pressure step but that the classical stability boundary is only slightly changed. The response to different types of input is evaluated.
ISSN:0010-2202
DOI:10.1080/00102209408935433
出版商:Taylor & Francis Group
年代:1994
数据来源: Taylor
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