3D ray tracing solver for communication blackout analysis in atmospheric entry missions

Giangaspero, Vincent F.; Sharma, Vatsalya; Laur, Johannes; Thoemel, Jan; Munafò, Alessandro; Lani, Andrea; Poedts, Stefaan

doi:10.1016/j.cpc.2023.108663

Cited by 4 publications

(1 citation statement)

References 28 publications

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“…Besides radar signatures of hypersonic targets, also the study of the radio communication blackout during the atmospheric re-entry is an important application area. First, considering the plasma sheath as layered medium with constant plasma values in each layer [5], [6], [7], [8], second, applying ray tracers [9], and, third, solving the electromagnetic wave propagation in plasma with rigorous numerical approaches like Finite Difference Time Domain (FDTD) solvers [10], [11], [12], [13]. These solutions, however, are not exact and use some approximations like a rectangular grid in usual FDTD schemes or require further assumptions like the absence of a magnetic field to simplify the considerations.…”

Section: Introductionmentioning

confidence: 99%

The Measurement of Radar–Plasma Signatures in a Hypersonic Shock Tunnel: Simulation and Experiment

Petervari,

Weidner,

Nekris

et al. 2023

IEEE Trans. Aerosp. Electron. Syst.

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The plasma sheath that forms around a body in hypersonic flight can change the radar signature substantially. The prediction of radar-plasma-signatures, however, is complex, since it incorporates aerothermodynamics and electromagnetics and requires a number of critical assumptions on chemical and aerodynamic parameters as well as on the electromagnetic plasma model. Hence, such an approach requires thorough experimental validation to estimate and reduce its uncertainty. But radar data of hypersonic targets in free flight is extremely rare and, if existing, mostly unavailable. A different validation approach, which This work was funded in the scope of the basic funding of the French and the German MoD and in parts by a dedicated BAAINBw project.

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Section: Introductionmentioning

confidence: 99%

The Measurement of Radar–Plasma Signatures in a Hypersonic Shock Tunnel: Simulation and Experiment

Petervari,

Weidner,

Nekris

et al. 2023

IEEE Trans. Aerosp. Electron. Syst.

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Influence of magnetohydrodynamics configuration on aerothermodynamics during Martian reentry

Sharma,

Giangaspero,

Poedts

et al. 2024

Physics of Fluids

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This paper investigates the role of magnetohydrodynamics (MHD) on the aerothermodynamics (ATD) of a representative entry vehicle while flying into the Martian atmosphere. By strategically placing a flight-ready superconducting magnet at varied positions in the Schiaparelli reentry capsule of the ExoMars mission, we discern its impact on essential flow properties. The primary consequence of MHD during atmospheric entry is the generation of the Lorentz force, which increases the shock standoff distance resulting in a reduction of the heat flux on the spacecraft by pushing high-energy plasma particles away. Through different magnet configurations, three distinct cases are formed to comprehensively understand the effects and implications of each setup. The study is performed using the COOLFluiD MHD for EnTries, an in-house ATD solver. For case 1, the magnet's placement behind the ExoMars forebody at the stagnation point reduces the heat flux. In case 2, the magnet's relocation to the shoulder region explores its potential to mitigate communication blackouts by influencing the wake region's flow. However, this positioning also induces shock bending, leading to variations in post-shock species mass fractions and heat flux spikes in the post-shock region. Case 3, involving an additional magnet where the shock bends in case 1, showcases a consistent increase in shock standoff distance across the forebody, providing a longer relaxation zone for species equilibration. Our findings highlight that while the strength of the applied magnetic field is crucial, the magnet's size is equally pivotal in determining ATD behavior. Case 3 emerges as the most promising configuration, consistently reducing heat flux across the forebody and maintaining it in the afterbody. This study underscores the potential of multi-magnet configurations as next-generation MHD heat shields for Martian atmospheric entry, emphasizing the criticality of magnet placement and configuration in enabling future MHD-enhanced deep space exploration missions.

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Plato: a high-fidelity tool for multi-component plasmas

Munafò

Panesi

2023

AIAA AVIATION 2023 Forum

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3D ray tracing solver for communication blackout analysis in atmospheric entry missions

Cited by 4 publications

References 28 publications

The Measurement of Radar–Plasma Signatures in a Hypersonic Shock Tunnel: Simulation and Experiment

The Measurement of Radar–Plasma Signatures in a Hypersonic Shock Tunnel: Simulation and Experiment

Influence of magnetohydrodynamics configuration on aerothermodynamics during Martian reentry

Plato: a high-fidelity tool for multi-component plasmas

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