A tomographic study of measurements in a V-shaped H2-air flame and a Lagrangian interpretation of the turbulent flame brush evolution

The flame front structure and movement of a lean V-shaped H2-air flame developing in a grid turbulent flow field were investigated using laser tomography for instantaneous mapping of the flame front. The spatial evolution of the flame front was followed by comparing the first and the second moments...

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Bibliographic Details
Published in:Combustion and flame 1990-09, Vol.81 (3-4), p.229-241
Main Authors: GOIX, P, PARANTHOEN, P, TRINITE, M
Format: Article
Language:English
Subjects:
Applied sciences
Combustion of gaseous fuels
Combustion. Flame
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Theoretical studies. Data and constants. Metering
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Summary:The flame front structure and movement of a lean V-shaped H2-air flame developing in a grid turbulent flow field were investigated using laser tomography for instantaneous mapping of the flame front. The spatial evolution of the flame front was followed by comparing the first and the second moments of flame front displacement with the downstream position. The results show that the shape and the dynamics of the flame are significantly affected by the turbulence characteristics and by the equivalence ratio. It was found that the growth of turbulence flame brush is linear for a distance that could be correlated with the Lagrangian time scale of the turbulence and that the slope of this evolution is proportional to the turbulence intensity at the flame holder. (I.S.)
ISSN:0010-2180
1556-2921
DOI:10.1016/0010-2180(90)90021-I