A Chemical Kinetic Model Including 54 Reactions for Modeling Air Nonequilibrium Inductively Coupled Plasmas

Yu, Minghao; Wang, Wei; Yao, Jiafeng; Zheng, Bo-Rui

doi:10.3938/jkps.73.1519

Cited by 3 publications

(1 citation statement)

References 21 publications

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“…) and 54 chemical reactions, [34] is employed in the present study. The forward and backward reaction rate are calculated from the Arrhenius formula.…”

Section: -4mentioning

confidence: 99%

Numerical simulation and experimental validation of multiphysics field coupling mechanisms for a high power ICP wind tunnel*

Yu¹,

Wang²,

Qiu³

et al. 2021

Chinese Phys. B

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We take the established inductively coupled plasma (ICP) wind tunnel as a research object to investigate the thermal protection system of re-entry vehicles. A 1.2-MW high power ICP wind tunnel is studied through numerical simulation and experimental validation. The distribution characteristics and interaction mechanism of the flow field and electromagnetic field of the ICP wind tunnel are investigated using the multi-field coupling method of flow, electromagnetic, chemical, and thermodynamic field. The accuracy of the numerical simulation is validated by comparing the experimental results with the simulation results. Thereafter, the wind tunnel pressure, air velocity, electron density, Joule heating rate, Lorentz force, and electric field intensity obtained using the simulation are analyzed and discussed. The results indicate that for the 1.2-MW ICP wind tunnel, the maximum values of temperature, pressure, electron number density, and other parameters are observed during coil heating. The influence of the radial Lorentz force on the momentum transfer is stronger than that of the axial Lorentz force. The electron number density at the central axis and the amplitude and position of the Joule heating rate are affected by the radial Lorentz force. Moreover, the plasma in the wind tunnel is constantly in the subsonic flow state, and a strong eddy flow is easily generated at the inlet of the wind tunnel.

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“…) and 54 chemical reactions, [34] is employed in the present study. The forward and backward reaction rate are calculated from the Arrhenius formula.…”

Section: -4mentioning

confidence: 99%

Numerical simulation and experimental validation of multiphysics field coupling mechanisms for a high power ICP wind tunnel*

Yu¹,

Wang²,

Qiu³

et al. 2021

Chinese Phys. B

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Numerical simulation of thermochemical non-equilibrium flow-field characteristics around a hypersonic atmospheric reentry vehicle

Qiu

Bowen

et al. 2022

Physics of Fluids

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A multi-physics thermochemical nonequilibrium model is established to study the flow characteristics of the plasma sheath around an atmospheric reentry demonstrator (ARD). This model includes the tight coupling of Navier-Stokes equations, 54 chemical reactions of air, and a four-temperature model. The processes of dissociation, ionization, and the internal energy exchanges of air components were successfully simulated during the aerodynamic heating of the reentry vehicle. The distributions of plasma sheath temperature, the molar fraction of air species, stagnation pressure, surface pressure, and electron number density around the reentry vehicle were obtained at different flight altitudes. Additionally, to validate the numerical model developed in this study, the flow characteristics of the Radio Attenuation Measurement-C-II (RAM-C-II) vehicle are also simulated and then compared with corresponding experimental data. They show good consistency in general. It is found that when the vehicle is at a high flight altitude, there is a strong thermochemical non-equilibrium phenomenon around the vehicle. However, the plasma sheath tends to be in local thermal equilibrium at a low flight altitude. The distance from the shock layer to the stagnation point decreases with a decrease in reentry altitude from 90 to 65 km, but increases with a decrease from 65 to 40 km. The electron number density in the shock layer is maximum. The distribution of the electron number density in the wake region differs significantly at different flight altitudes.

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Numerical investigation of surface catalytic effect on the plasma sheath of a hypersonic re-entry capsule

Takahashi

2023

Physics of Fluids

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Radio frequency blackout indicates the communication interruption between signal monitoring sites and re-entry vehicles; it is a serious threat to the safety of astronauts and the space exploration missions. In this study, a surface catalytic model coupled with a thermochemical non-equilibrium computational fluid dynamic model is developed to study the catalytic wall effect on the plasma sheath of a hypersonic re-entry vehicle. The mechanism of the surface catalytic effect on the plasma sheath of a re-entry capsule is revealed by a comparative study. The flow-field characteristics simulated under conditions of the full-catalytic and non-catalytic walls are compared and discussed for the hypersonic atmospheric re-entry capsule at different altitudes. The chemical and physical mechanisms behind the surface catalytic effect of the re-entry capsule are analyzed. The experimental data of Radio Attenuation Measurement-C-II are used to validate the numerical model established in the present study. It is found that the numerical results simulated with the fully catalytic wall are more consistent with the experimental data. Near the capsule wall, the mole fractions of the species N, O, N+, and O+ decrease as the catalytic recombination coefficient increases. Because of the surface catalytic effect, the communication black is mitigated due to the reduction of the electron number density in the wake zone of the capsule.

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A Chemical Kinetic Model Including 54 Reactions for Modeling Air Nonequilibrium Inductively Coupled Plasmas

Cited by 3 publications

References 21 publications

Numerical simulation and experimental validation of multiphysics field coupling mechanisms for a high power ICP wind tunnel*

Numerical simulation and experimental validation of multiphysics field coupling mechanisms for a high power ICP wind tunnel*

Numerical simulation of thermochemical non-equilibrium flow-field characteristics around a hypersonic atmospheric reentry vehicle

Numerical investigation of surface catalytic effect on the plasma sheath of a hypersonic re-entry capsule

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