Abstract

Two-color OH planar laser induced fluorescence (PLIF) thermometry and two-photon CO PLIF are used to characterize inverse diffusion flames. These flames are important tools to aid in understanding the secondary reaction zones in gas turbine engines that result from film-cooling air reacting with fuel-rich packets exiting from the combustor. For the experiments performed here, the exhaust from a well-stirred reactor is channeled to a test section where three different film-cooling geometries are used to create inverse diffusion flames. The two-color OH PLIF data shows the area with significant reactions as well as a two dimensional temperature field. The two-photon CO PLIF shows the consumption of the CO as a primary fuel in the secondary reaction zone.

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