Feasibility of One-Dimensional Rotational and Vibrational Raman in High Speed Flames
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abstract
We present the design and construction of a supersonic flame burner, that can operate in a dual mode, as a premixed jet combustor, as well as a partially premixed jet afterburner. We examine the ignition and flame holding characteristics of the premixed mode by using a well stirred reactor model to quantify the stability characteristics of its operation. The apparatus can generate canonical supersonic flames that are optically accessible, have high pressure variation, and offer the potential for significant flame extinction. We examine the feasibility of applying rotational and vibrational Raman line imaging into the supersonic flames. Preliminary results prove the applicability of the technique to such flowfields and showcase the capability to measure major species of combustion, identify regions of varying pressure and temperature, and bring out the salient features of the reacting flow. One important result is the identification of unburned fuel in the hot products of a partially premixed flame. Copyright 2012 by the American Institute of Aeronautics and Astronautics, Inc.
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50th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition
