Characterization of turbulent premixed flame structure for mathematical modeling of combustion
Measurements of wrinkle size are made extensively in laminar and turbulent premixed flames to find out the origin of flame wrinkling in turbulent premixed flames, and conclusions are summarized as follows:
Two types of instability are observed on the laminar flame front stabilized by a flame holder. These instabilities are caused by the strong shearing stress developed by the high velocity gradient between the unburned mixture and burned gas.
The laminar flame instability plays an predominant role in flame wrinkling and the unburned mixture turbulence triggers the two types of laminar flame instability in the turbulent premixed flames.
It is found qualitatively that the mixture turbulence broadens the wrinkle size distributions.
KeywordsEquivalence Ratio Turbulent Combustion Laminar Flame Damkohler Number Turbulent Premix Flame
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