TY - GEN
T1 - Plasma Structure and Non-Equilibrium Thermodynamics of Atmospheric Millimeter-Wave Discharge in Microwave Rocket
AU - Tabata, Kuniyoshi
AU - Manabe, Ayuto
AU - Takase, Yoshiki
AU - Komurasaki, Kimiya
AU - Kawashima, Rei
AU - Sekine, Hokuto
N1 - Funding Information:
This work was supported by JSPS KAKENHI Grant Numbers JP20H02344 and JP21J13104.
Publisher Copyright:
© 2022, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.
PY - 2022
Y1 - 2022
N2 - Plasma structures, as well as vibrational and rotational temperatures of millimeter-wave discharge plasma were investigated experimentally using a 28 GHz gyrotron beam. Four plasma structures were observed in the range of 10–100 kPa and 0.01–1.0 GW/m2 . Besides, the vibrational temperature didn’t exceed 6000 K at beam intensities of 0.067–0.46 GW/m2 and atmospheric pressure, and non-equilibrium between vibrational and translational–rotational temperatures was confirmed. Furthermore, a two-dimensional and two-temperature CFD simulation was carried out which took into account the non-equilibrium temperatures and plasma structures. The computational results suggested that an ionization-wave front can exceed a shock wave front on the order of one millimeter due to the energy relaxation delay from vibrational to translational temperature.
AB - Plasma structures, as well as vibrational and rotational temperatures of millimeter-wave discharge plasma were investigated experimentally using a 28 GHz gyrotron beam. Four plasma structures were observed in the range of 10–100 kPa and 0.01–1.0 GW/m2 . Besides, the vibrational temperature didn’t exceed 6000 K at beam intensities of 0.067–0.46 GW/m2 and atmospheric pressure, and non-equilibrium between vibrational and translational–rotational temperatures was confirmed. Furthermore, a two-dimensional and two-temperature CFD simulation was carried out which took into account the non-equilibrium temperatures and plasma structures. The computational results suggested that an ionization-wave front can exceed a shock wave front on the order of one millimeter due to the energy relaxation delay from vibrational to translational temperature.
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U2 - 10.2514/6.2022-3573
DO - 10.2514/6.2022-3573
M3 - Conference contribution
AN - SCOPUS:85135012050
SN - 9781624106354
T3 - AIAA AVIATION 2022 Forum
BT - AIAA AVIATION 2022 Forum
PB - American Institute of Aeronautics and Astronautics Inc, AIAA
T2 - AIAA AVIATION 2022 Forum
Y2 - 27 June 2022 through 1 July 2022
ER -