TY - GEN
T1 - Characterization of spark- and laser-ignition of bio- and natural gas
AU - Peters, Nathan D.
AU - Akih-Kumgeh, Ben
N1 - Publisher Copyright:
Copyright © 2017 ASME.
PY - 2017
Y1 - 2017
N2 - This paper presents a comparative investigation of the early phase of combustion initiated by a focused pulsed laser beam and a conventional spark-discharge. The comparative approach is applied to the characterization of combustible mixtures of natural gas and biogas with varying CO2 content. Interferometry and Schlieren imaging are used to probe flame kernel formation and its subsequent transition to a self-sustained flame. The pressure rise in the chamber is also recorded by means of a fast-response piezo-electric pressure transducer. From these diagnostics, differences between the early phases of laser-induced and sparkignition are revealed. Unlike in laser-induced ignition, sparkignition features a delay in the transition from the early flame kernel to a self-sustained flame (attributed to heat loss), which leads to failed ignition for mixtures with high CO2 content. The role of CO2 as an ignition retardant is observed by comparing fuel/air mixtures with and without CO2.
AB - This paper presents a comparative investigation of the early phase of combustion initiated by a focused pulsed laser beam and a conventional spark-discharge. The comparative approach is applied to the characterization of combustible mixtures of natural gas and biogas with varying CO2 content. Interferometry and Schlieren imaging are used to probe flame kernel formation and its subsequent transition to a self-sustained flame. The pressure rise in the chamber is also recorded by means of a fast-response piezo-electric pressure transducer. From these diagnostics, differences between the early phases of laser-induced and sparkignition are revealed. Unlike in laser-induced ignition, sparkignition features a delay in the transition from the early flame kernel to a self-sustained flame (attributed to heat loss), which leads to failed ignition for mixtures with high CO2 content. The role of CO2 as an ignition retardant is observed by comparing fuel/air mixtures with and without CO2.
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U2 - 10.1115/GT2017-64902
DO - 10.1115/GT2017-64902
M3 - Conference contribution
AN - SCOPUS:85028994728
T3 - Proceedings of the ASME Turbo Expo
BT - Coal, Biomass and Alternative Fuels; Cycle Innovations; Electric Power; Industrial and Cogeneration Applications; Organic Rankine Cycle Power Systems
PB - American Society of Mechanical Engineers (ASME)
T2 - ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition, GT 2017
Y2 - 26 June 2017 through 30 June 2017
ER -