TY - GEN
T1 - Scramjet Engine Ignition by NS Aperiodic Discharge
AU - Starikovskiy, Andrey
AU - Ju, Yiguang
AU - Klassen, Michael
N1 - Publisher Copyright:
© 2024 by authors. Published by the American Institute of Aeronautics and Astronautics, Inc.
PY - 2024
Y1 - 2024
N2 - Numerous attempts have been made to improve the combustion characteristics with the help of electrical discharges. In particular, ignition of the fuel in the cavity was initiated and stabilized using standard aviation spark plugs based on a sliding spark. all existing solutions for ignition systems have significant drawbacks that limit the effectiveness of their use for hypersonic systems. This is mainly due to conflicting requirements for such an ignition system. It must work stably both at moderate and at very high gas velocities; it should provide effective ignition both at low temperatures and at temperatures close to the self-ignition threshold; finally, it must have low energy consumption. The solution proposed in this paper is a high-voltage NS aperiodic discharge. The feature of the discharge is the generation of high-frequency, low-amplitude NS pulses in combination with low-frequency, high-amplitude pulses to initiate the discharge. We use the pulses of alternating polarity to increase the potential difference between the residual space charge and high-voltage electrode and to facilitate the discharge start and propagation. Because of the combined excitation with two different types of high-voltage pulses the total energy consumption for the system operation is relatively low and could be estimated as P = 5-10 kW for 1000 cm3 ignition volume for a core of a supersonic gas flow.
AB - Numerous attempts have been made to improve the combustion characteristics with the help of electrical discharges. In particular, ignition of the fuel in the cavity was initiated and stabilized using standard aviation spark plugs based on a sliding spark. all existing solutions for ignition systems have significant drawbacks that limit the effectiveness of their use for hypersonic systems. This is mainly due to conflicting requirements for such an ignition system. It must work stably both at moderate and at very high gas velocities; it should provide effective ignition both at low temperatures and at temperatures close to the self-ignition threshold; finally, it must have low energy consumption. The solution proposed in this paper is a high-voltage NS aperiodic discharge. The feature of the discharge is the generation of high-frequency, low-amplitude NS pulses in combination with low-frequency, high-amplitude pulses to initiate the discharge. We use the pulses of alternating polarity to increase the potential difference between the residual space charge and high-voltage electrode and to facilitate the discharge start and propagation. Because of the combined excitation with two different types of high-voltage pulses the total energy consumption for the system operation is relatively low and could be estimated as P = 5-10 kW for 1000 cm3 ignition volume for a core of a supersonic gas flow.
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U2 - 10.2514/6.2024-0183
DO - 10.2514/6.2024-0183
M3 - Conference contribution
AN - SCOPUS:85192138245
SN - 9781624107115
T3 - AIAA SciTech Forum and Exposition, 2024
BT - AIAA SciTech Forum and Exposition, 2024
PB - American Institute of Aeronautics and Astronautics Inc, AIAA
T2 - AIAA SciTech Forum and Exposition, 2024
Y2 - 8 January 2024 through 12 January 2024
ER -