Abstract
Local structures of unequal turbulent flames formed in an opposite flow have been studied experimentally for fundamental studies of the stratified combustion. Three different gas conditions, non-reacting flow, ultra lean and lean premixed reacting flow, are impinged on each other and triple boundaries which are upper and lower boundaries (UB and LB) and impinging surface (IS) are formed in the control volume. The visualized triple boundaries are taken by a laser tomography technique with a high speed camera. Time series movement, probability density function, auto correlation and cross correlation are discussed. UB, LB and IS characteristics are strongly influenced by reactive flow conditions.
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