Incident shock waves in pure CO have been characterized in the Electric Arc Shock Tube facility at NASA Ames Research Center. Spectrally and spatially resolved emission spectra characterize radiative signatures from CO in the VUV (Vacuum Ultra-Violet) and mid-infrared and atomic carbon and C2 in the visible. CO absorption of a single vibrational line is also measured with a tunable diode laser. The experimental data analyzed here are at a pressure of 0.25 Torr in the driven section and span a shock velocity range from 3.4-9.5 km/s. The emission and absorption signals are analyzed to extract temperature relaxation behind the shock which is used to derive the rate of CO dissociation. The emission spectra are compared to results using different kinetic parameters for CO dissociation and C2 dissociation and exchange. Different rates from the literature are found to match the data from 3.4-6.6 km/s and 6.6-9.5 km/s. Areas for improvement in CO and C2 radiation modeling are suggested on the basis of the analysis.


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    Title :

    Characterization of CO Thermochemistry in Incident Shockwaves


    Contributors:

    Conference:

    AIAA Aviation and Aeronautics Forum (Aviation 2018) ; 2018 ; Atlanta, GA, United States
    AIAA Aviation and Aeronautics Forum 2018 Joint Thermophysics and Heat Transfer Conference ; 2018 ; Atlanta, GA, United States


    Publication date :

    2018-06-27


    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English




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