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Electronic-state-resolved analysis of high-enthalpy air plasma flows
Sung Min Jo1, Oh Joon Kwon, Jae Gang Kim2
1Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea.
Physical Review. E
|October 24, 2019
Summary
New methods for analyzing nonequilibrium air plasma flows show improved accuracy in predicting radiation and electron density. These electronic state-to-state approaches enhance understanding of shock wave phenomena.
Area of Science:
- Plasma Physics
- Aerodynamics
- Chemical Kinetics
Background:
- Non-equilibrium air plasma flows behind shock waves are complex.
- Accurate modeling is crucial for understanding high-speed aerodynamic phenomena.
Purpose of the Study:
- To develop and compare three electronic state-to-state methods for analyzing nonequilibrium air plasma flows.
- To assess the accuracy of these methods against experimental data.
Main Methods:
- A conventional two-temperature model with quasi-steady-state assumption.
- Coupling atomic and molecular electronic master equations with conservation equations.
- Compilation and comparison of state-of-the-art electronic transition rates.
Main Results:
- The proposed electronic master equation coupling methods show higher accuracy than the conventional approach.
- Improved prediction of diatomic and atomic radiation intensity.
- More accurate spatial distribution predictions for intensity and electron number density.
Conclusions:
- Electronic master equation coupling methods provide superior accuracy for nonequilibrium air plasma flow analysis.
- These methods are particularly effective in conditions dominated by diatomic or atomic non-equilibrium.
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