TY - GEN
T1 - In-situ laser diagnostics of pentane oxidation and pyrolysis in nanosecond-pulsed plasma discharges
AU - Rousso, Aric
AU - Mao, Xingqian
AU - Chen, Qi
AU - Ju, Yiguang
N1 - Publisher Copyright:
© 2018, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.
PY - 2018
Y1 - 2018
N2 - This study explores plasma assisted pentane oxidation and pyrolysis in a nanosecond pulsed discharge using laser absorption spectroscopy and gas chromatography. An updated pentane model is developed with C0-C2 substitution by HP-Mech, plasma chemistry sub-mechanism, and new electron impact dissociation reactions added. Using temperature as a model input, the electron impact cross sections of pentane are adjusted so the model accurately predicts the pyrolysis steady state and time-dependent species profiles, and then tested on the oxidation case. Results show favorable prediction of pentane consumption and H2O and CH2O formation. CH4 is slightly under-predicted by the new model, while C2H2 is overpredicted, likely due to under-consumption, perhaps by radicals such as OH. The addition of electron impact dissociation reactions slows the overall oxidative pathway by a reduction in OH concentration and prevents over-prediction by adjusting the branching ratio towards smaller hydrocarbons instead of oxidative species.
AB - This study explores plasma assisted pentane oxidation and pyrolysis in a nanosecond pulsed discharge using laser absorption spectroscopy and gas chromatography. An updated pentane model is developed with C0-C2 substitution by HP-Mech, plasma chemistry sub-mechanism, and new electron impact dissociation reactions added. Using temperature as a model input, the electron impact cross sections of pentane are adjusted so the model accurately predicts the pyrolysis steady state and time-dependent species profiles, and then tested on the oxidation case. Results show favorable prediction of pentane consumption and H2O and CH2O formation. CH4 is slightly under-predicted by the new model, while C2H2 is overpredicted, likely due to under-consumption, perhaps by radicals such as OH. The addition of electron impact dissociation reactions slows the overall oxidative pathway by a reduction in OH concentration and prevents over-prediction by adjusting the branching ratio towards smaller hydrocarbons instead of oxidative species.
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U2 - 10.2514/6.2018-1193
DO - 10.2514/6.2018-1193
M3 - Conference contribution
AN - SCOPUS:85141616495
SN - 9781624105241
T3 - AIAA Aerospace Sciences Meeting, 2018
BT - AIAA Aerospace Sciences Meeting
PB - American Institute of Aeronautics and Astronautics Inc, AIAA
T2 - AIAA Aerospace Sciences Meeting, 2018
Y2 - 8 January 2018 through 12 January 2018
ER -