Scalar dissipation rates in high Reynolds number turbulent nonpremixed jets have been investigated experimentally and theoretically. Both a nonreacting propane jet and a reacting jet mixture of hydrogen and argon were studied. The scalar dissipation rates were determined by using an optical multichannel analyzer to measure the instantaneous distribution of Rayleigh scattered light along a beam from a high energy pulsed dye laser. The time resolved spatial distribution of the conserved scalar and the local gradients were calculated from the Rayleigh-scattered light intensity distribution. A second-order closure numerical model including the transport equations for scalar dissipation is presented. The effect of density fluctuations is analyzed.
|Original language||English (US)|
|Journal||Western States Section, Combustion Institute (Paper)|
|State||Published - 1984|
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