Comparison of CARS Temperature Profile Measurements with Flow-Field Model Calculations in an MHD Diffuser

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Abstract
This paper reports on recent gas temperature profile measurements made on a large-scale coal-fired flow facility (CFFF) with a coherent anti-Stokes Raman spectroscopy (CARS) system. These measurements further demonstrate the application of advanced optical diagnostic methods to characterize large-scale processes. Data from the CARS gas temperature measurements taken in the CFFF diffuser during a recent long-duration experiment are discussed and analyzed. Details are given on the CARS system. Comparisons are drawn between the CARS data and flow-field modeling results. These results define the flow field and heat transfer in the diffuser and provide a basis for interpreting the CARS temperature measurements and further evaluating the flow-field model.