Using laser imaging data for scalar mixing collected in turbulent jets of Frcon-12, synthesised images are generated for reaction zones in turbulent nonpremixed flames of hydrogen at high Damkholer numbers. It is found that Quasi-Equilibrium Distributed Reaction (QEDR) zones govern the flame structure except in the first fifteen jet diameters near the nozzle. This structure which otherwise follows the stoichiometric mixture fraction #x3BE;, tends towards that of scalar dissipation, #x3C7;as the distance from the nozzle increases.
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