TY - GEN
T1 - Spatial and temporal non-equilibrium of millimeter-wave discharge plasma in microwave rocket
AU - Tabata, Kuniyoshi
AU - Britz, Hanco
AU - Komurasaki, Kimiya
AU - Kawashima, Rei
AU - Koizumi, Hiroyuki
N1 - Funding Information:
This work was supported by JSPS KAKENHI under Grant No. JP15H05770.
Publisher Copyright:
© 2021, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.
PY - 2021
Y1 - 2021
N2 - Plasma structures, as well as vibrational and rotational temperatures of millimeter-wave discharge plasma in Microwave Rocket were investigated experimentally using a 28 GHz gyrotron beam. Four plasma structures were observed, including a comb-shaped structure in the range of 10–100 kPa and 0.01–1.0 GW/m2, which is a typical plasma structure observed in millimeter-wave discharge plasma. Besides, it was found that vibrational temperature didn’t exceed 6000 K at the beam intensity of 0.067–0.46 GW/m2 at atmospheric pressure, and non-equilibrium between vibrational and rotational temperatures was confirmed. Furthermore, a two-dimensional CFD was conducted, considering non-equilibrium temperatures and the plasma structures. The computational results suggested that over 2.0 GW/m2, an ionization-wave front can exceed a pressure-spike front in 1–10 mm order.
AB - Plasma structures, as well as vibrational and rotational temperatures of millimeter-wave discharge plasma in Microwave Rocket were investigated experimentally using a 28 GHz gyrotron beam. Four plasma structures were observed, including a comb-shaped structure in the range of 10–100 kPa and 0.01–1.0 GW/m2, which is a typical plasma structure observed in millimeter-wave discharge plasma. Besides, it was found that vibrational temperature didn’t exceed 6000 K at the beam intensity of 0.067–0.46 GW/m2 at atmospheric pressure, and non-equilibrium between vibrational and rotational temperatures was confirmed. Furthermore, a two-dimensional CFD was conducted, considering non-equilibrium temperatures and the plasma structures. The computational results suggested that over 2.0 GW/m2, an ionization-wave front can exceed a pressure-spike front in 1–10 mm order.
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M3 - Conference contribution
AN - SCOPUS:85099810874
SN - 9781624106095
T3 - AIAA Scitech 2021 Forum
SP - 1
EP - 10
BT - AIAA Scitech 2021 Forum
PB - American Institute of Aeronautics and Astronautics Inc, AIAA
T2 - AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2021
Y2 - 11 January 2021 through 15 January 2021
ER -