Consistent ignition in environments where combustion products are present is critical for the safety and reliability of some propulsion applications. Prior research has shown that residual CO 2 can reduce the probability of forced ignition of CH 4 / air mixtures by decreasing the concentration of H radicals. However, the applicability of these observations to larger hydrocarbon fuels, such as jet-A, is not known. Ignition probabilities and volumetric kernel growth rates for vaporized jet-A/air/diluent mixtures were determined from radiation intensity measurements collected using an FLIR SC6700 infrared camera. Measurements of ignition probability of jet-A/air mixtures showed no appreciable reduction in ignition probability for mixtures with similar X dil and T ad . Mixtures diluted with CO 2 showed no statistical change in average growth rates compared to undiluted and N 2 diluted mixtures. One-dimensional reacting flow simulations were conducted to help identify why no apparent chemical sensitivity to CO 2 was observed for the jet-A/air mixtures, in contrast to results reported for CH 4 / air . A greater concentration of H radicals was predicted for jet-A/air mixtures when compared to CH 4 / air mixtures, even when CO 2 is present. Further analysis showed that different reaction pathways exist for jet-A when compared to CH 4 and that these reaction pathways are affected differently in the presence of residual CO 2 .


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Effect of CO 2 Dilution on Forced Ignition of Jet-A/Air Mixtures


    Beteiligte:

    Erschienen in:

    Erscheinungsdatum :

    2022-09-30


    Format / Umfang :

    10 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




    EFFECT OF CO2 AND N2 DILUTION ON FORCED IGNITION OF JET A/AIR MIXTURES

    Teope, Kaz / Bonebrake, Jonathan M. / Blunck, David L. | TIBKAT | 2020


    Effect of CO2 and N2 Dilution on Forced Ignition of Jet A/air Mixtures

    Teope, Kaz / Bonebrake, Jonathan M. / Blunck, David L. | AIAA | 2020


    Effect of Dilution With NO on Spark Ignition of CH4/Air Mixtures

    Bonebrake, Jonathan M. / Ombrello, Timothy / Blunck, David L. | TIBKAT | 2019


    Effect of Dilution With NO on Spark Ignition of CH4/air Mixtures

    Bonebrake, Jonathan M. / Ombrello, Timothy / Blunck, David L. | AIAA | 2019


    Forced ignition and spread tests

    Torero, J. / Ross, H. / Fernandez-Pello, A. | AIAA | 2001