The two-photon photolysis of propane-air mixtures has been investigated as a possible source of tag species for velocity measurements. Emission spectra of the propane photofragments indicate the presence of the C atom, C2, and CN (with the addition of air). Emission at 216 nm is speculated to be from a primary fragment and varies linearly with propane concentration. Emission from the photofragments is shown to be dependent upon the local air-to-fuel ratio. Chemical lifetime measurements of the CN- and CH-radical photofragments indicate a lifetime of 3-5 microseconds. These photofragments can be utilized as tag species in flow fields above 50 m/s.


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    Title :

    Laser diagnostics for velocity measurements in supersonic combusting environments


    Additional title:

    Laserdiagnosen für Geschwindigkeitsuntersuchungen in Überschallverbrennungsregionen


    Contributors:
    Goss, L.P. (author) / Chen, T.H. (author) / Schommer, D.G. (author) / Nejad, A.S. (author)

    Published in:

    Publication date :

    1992


    Size :

    7 Seiten, 16 Bilder, 2 Tabellen, 12 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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