A technique is described for measuring transverse turbulence intensity in flames which makes use of the diffusion of helium. The latter is detected by a thermal conductivity method. The effects of various experimental parameters and the reliability of the technique are discussed. Results obtained in highly turbulent flames stabilized on various baffles in a 5 cmtimes;20 cm duct are given, and compared with results obtained under comparable cold flow conditions. It appears that, under the conditions of these experiments, the amount of ``flamehyphen;generated'' turbulence detectable at a fixed point in the duct by this technique is probably small.
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