Numerical Simulation of Plasma Flows and Radio-Frequency Blackout in Atmospheric Reentry Demonstrator Mission

2017 ◽  
Author(s):  
Minseok Jung ◽  
Hisashi Kihara ◽  
Ken-ichi Abe ◽  
Yusuke Takahashi
Keyword(s):  
Numerical Simulation ◽  
Radio Frequency ◽  
Plasma Flows ◽  
Atmospheric Reentry

scholarly journals Implementation of Surface Radiation and Fluid-Structure Thermal Coupling in Atmospheric Reentry

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Ojas Joshi ◽  
Pénélope Leyland
Keyword(s):  
Numerical Simulation ◽  
Radiative Heating ◽  
Surface Radiation ◽  
Radiative Cooling ◽  
Thermal Coupling ◽  
Total Heat Flux ◽  
Hollow Cone ◽  
Atmospheric Reentry ◽  
Thermal Fields ◽  
Flap Region

During atmospheric reentry, radiative heating is one of the most important component of the total heat flux. In this paper, we investigate how the thermal radiation coming from the postshock region interacts with the spacecraft structure. A model that takes into account the radiation reflected by the surface is developed and implemented in a solid solver. A partitioned algorithm performs the coupling between the fluid and the solid thermal fields. Numerical simulation of a hollow cone head and a deployed flap region shows the effects of the radiative cooling and the significance of the surface radiation.

Numerical Simulation of Plasma Flows in the Interior Cavities of Laser Fusion Targets

1997 ◽  
Vol 18 (6) ◽  
pp. 515-528 ◽  
Author(s):  
V. A. Gasilov ◽  
S. Yu. Gus’kov ◽  
A. Yu. Krukovskii ◽  
I. G. Lebo ◽  
A. A. Otochin ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Laser Fusion ◽  
Plasma Flows

Numerical analysis on the effect of angle of attack on evaluating radio-frequency blackout in atmospheric reentry

2016 ◽  
Vol 68 (11) ◽  
pp. 1295-1306 ◽  
Author(s):  
Minseok Jung ◽  
Hisashi Kihara ◽  
Ken-ichi Abe ◽  
Yusuke Takahashi
Keyword(s):  
Numerical Analysis ◽  
Radio Frequency ◽  
Angle Of Attack ◽  
Atmospheric Reentry

Comparison of Two Techniques for Radio-frequency Hepatic Tumor Ablation through Numerical Simulation

2011 ◽  
Author(s):  
N. Kosturski ◽  
S. Margenov ◽  
Y. Vutov ◽  
Michail D. Todorov ◽  
Christo I. Christov
Keyword(s):  
Numerical Simulation ◽  
Radio Frequency ◽  
Hepatic Tumor ◽  
Tumor Ablation

scholarly journals A Metamaterial-Inspired Approach to Mitigating Radio Frequency Blackout When a Plasma Forms Around a Reentry Vehicle

Photonics ◽  
2020 ◽  
Vol 7 (4) ◽  
pp. 88
Author(s):  
Bruce A. Webb ◽  
Richard W. Ziolkowski
Keyword(s):  
Radio Frequency ◽  
Plasma Layer ◽  
Signal Transmission ◽  
Split Ring Resonator ◽  
Dipole Antennas ◽  
Electromagnetic Plane Wave ◽  
Reentry Vehicle ◽  
Atmospheric Reentry ◽  
Matched Design ◽  
Electromagnetic Plane

Radio frequency (RF) blackout and attenuation have been observed during atmospheric reentry since the advent of space exploration. The effects range from severe attenuation to complete loss of communications and can last from 90 s to 10 min depending on the vehicle’s trajectory. This paper examines a way of using a metasurface to improve the performance of communications during reentry. The technique is viable at low plasma densities and matches a split-ring resonator (SRR)-based mu-negative (MNG) sheet to the epsilon-negative (ENG) plasma region. Considering the MNG metasurface as a window to the exterior of a reentry vehicle, its matched design yields high transmission of an electromagnetic plane wave through the resulting MNG-ENG metastructure into the region beyond it. A varactor-based SRR design facilitates tuning the MNG layer to ENG layers with different plasma densities. Both simple and Huygens dipole antennas beneath a matched metastructure are then employed to demonstrate the consequent realization of significant signal transmission through it into free space beyond the exterior ENG plasma layer.

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