TY - GEN
T1 - Measurements and kinetic modeling analysis of energy coupling in nanosecond pulse dielectric barrier discharges
AU - Takashima, Keisuke
AU - Yin, Zhiyao
AU - Adamovich, Igor V.
N1 - Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2012
Y1 - 2012
N2 - Nsec pulse discharge plasma imaging, coupled pulse energy measurements, and kinetic modeling are used to analyze the mechanism of energy coupling in high repetition rate, spatially uniform, nanosecond pulse discharges in air in plane-to-plane geometry. At these conditions, coupled pulse energy scales nearly linearly with pressure (number density), with energy coupled per molecule being nearly constant, in good agreement with the kinetic model predictions. In spite of high peak reduced electric field reached before breakdown, E/N ~ 500-700 Td, the reduced electric field in the plasma after breakdown is much lower, E/N~50-100 Td, predicting that a significant fraction of energy coupled to the air plasma, up to 30-40%, is loaded into nitrogen vibrational mode. A self-similar, local ionization kinetic model predicting energy coupling to the plasma in a surface ionization wave discharge produced by a nanosecond voltage pulse, has been developed. The model predicts key discharge parameters such as ionization wave speed and propagation distance, electric field, electron density, plasma layer thickness, and pulse energy coupled to the plasma, demonstrating good qualitative agreement with experimental data and two-dimensional kinetic modeling calculations. The model allows an analytic solution and lends itself to incorporating into existing compressible flow codes, at very little computational cost, for in-depth analysis of the nanosecond discharge plasma flow control mechanism. The use of the model would place the main emphasis on coupling of localized thermal perturbations produced by the discharge with the flow via compression waves, as well as on instability development and coherent structures formation, and would provide quantitative insight into the flow control mechanism on a long time scale.
AB - Nsec pulse discharge plasma imaging, coupled pulse energy measurements, and kinetic modeling are used to analyze the mechanism of energy coupling in high repetition rate, spatially uniform, nanosecond pulse discharges in air in plane-to-plane geometry. At these conditions, coupled pulse energy scales nearly linearly with pressure (number density), with energy coupled per molecule being nearly constant, in good agreement with the kinetic model predictions. In spite of high peak reduced electric field reached before breakdown, E/N ~ 500-700 Td, the reduced electric field in the plasma after breakdown is much lower, E/N~50-100 Td, predicting that a significant fraction of energy coupled to the air plasma, up to 30-40%, is loaded into nitrogen vibrational mode. A self-similar, local ionization kinetic model predicting energy coupling to the plasma in a surface ionization wave discharge produced by a nanosecond voltage pulse, has been developed. The model predicts key discharge parameters such as ionization wave speed and propagation distance, electric field, electron density, plasma layer thickness, and pulse energy coupled to the plasma, demonstrating good qualitative agreement with experimental data and two-dimensional kinetic modeling calculations. The model allows an analytic solution and lends itself to incorporating into existing compressible flow codes, at very little computational cost, for in-depth analysis of the nanosecond discharge plasma flow control mechanism. The use of the model would place the main emphasis on coupling of localized thermal perturbations produced by the discharge with the flow via compression waves, as well as on instability development and coherent structures formation, and would provide quantitative insight into the flow control mechanism on a long time scale.
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U2 - 10.2514/6.2012-3093
DO - 10.2514/6.2012-3093
M3 - Conference contribution
AN - SCOPUS:85088337853
SN - 9781624101878
T3 - 43rd AIAA Plasmadynamics and Lasers Conference 2012
BT - 43rd AIAA Plasmadynamics and Lasers Conference 2012
PB - American Institute of Aeronautics and Astronautics Inc.
T2 - 43rd AIAA Plasmadynamics and Lasers Conference 2012
Y2 - 25 June 2012 through 28 June 2012
ER -