Electromagnetic Wave / Magnetoactive Plasma Sheath Interaction for Hypersonic Vehicle Telemetry Blackout Analysis

Starkey, Ryan P.

doi:10.2514/6.2003-4167

Cited by 26 publications

(22 citation statements)

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“…The results of pure air flow (without ablations) and those with ablations are compared. For simulations of this type of high speed flows, accurate chemical models for charge exchanges can directly affect the accuracy of electron number density 28,29 and several other interesting flowfield properties. Based on the work by Cresswell and Porter 30 , a 26-species model with 54 chemical reactions was developed which considered resin with siliconrelated species.…”

Section: Validations and Discussionmentioning

confidence: 99%

Numerical simulations of high enthalpy flows around entry bodies

Cai

2016

Chinese Journal of Aeronautics

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Ablation flows around entry bodies are at highly nonequilibrium states. This paper presents comprehensive computational fluid dynamics simulations of such hypersonic flow examples. The computational scheme adopted in this study is based on the Navier-Stokes equations, and it is capable of simulating multiple-dimensional, non-equilibrium, chemically reacting gas flows with multiple species. Finite rate chemical reactions, multiple temperature relaxation processes, and ionizations phenomena with electrons are modeled. Simulation results of several hypersonic gas flows over axisymmetric bodies are presented and compared with results in the literature. It confirms that some past treatment of adopting less species for hypersonic flows is acceptable, and the differences from more species and more chemical reactions are not significant.

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Section: Validations and Discussionmentioning

confidence: 99%

Numerical simulations of high enthalpy flows around entry bodies

Cai

2016

Chinese Journal of Aeronautics

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“…Hypersonic cruise vehicles operating within the atmosphere would also experience intermittent or continuous blackout depending on altitude and velocity. 4 Developing solutions that allow communication through a plasma layer are a high priority because of flight safety, catastrophe analysis, and mission success. 5 During 10 minutes of radio blackout, a hypersonic vehicle could fly thousands of miles without guidance from a ground station or GPS satellite.…”

Section: Introductionmentioning

confidence: 99%

Numerical Modeling of Plasma Manipulation Using an ExB Layer in the Hypersonic Boundary Layer

Kim

Boyd²,

Keidar

2009

40th AIAA Plasmadynamics and Lasers Conference

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When a vehicle flies with hypersonic velocity or re-enters the atmosphere, a weakly ionized plasma layer is generated around the vehicle due to the shock heated air. Since the created plasma layer has a high plasma number density, the vehicle has a communication problem known as radio blackout. In this study, we illustrate that an applied ExB layer can manipulate the plasma density in a specific region. The manipulated plasma reduces radio wave attenuation in the plasma layer and provides the possibility for communication during radio blackout. The possibility of the ExB layer mitigation scheme is evaluated in a realistic operating condition for a hypersonic flow in terms of signal attenuation.

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“…Blackout mitigation is an important requirement for the design of hypersonic vehicles, especially for those vehicles in steady state hypersonic flight such as those envisioned by NASA and the US Air Force. A few mitigation mechanisms described in the literature are the magnetic window [2][3][4][5][6], electrophilic fluid injection [7], wave frequency modification, aerodynamic shape modification, E × B drift [8,9], resonant transmission [10], time varying magnetic field [11] and electron acoustic wave transmission [12].…”

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confidence: 99%

Modeling Radio Communication Blackout and Blackout Mitigation in Hypersonic Vehicles

Kundrapu¹,

Loverich²,

Beckwith³

et al. 2015

Journal of Spacecraft and Rockets

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A procedure for the modeling and analysis of radio communication blackout of hypersonic vehicles is presented. The weakly ionized plasma generated around the surface of a hypersonic reentry vehicle is simulated using full Navier-Stokes equations in multi-species single fluid form. A seven species air chemistry model is used to compute the individual species densities in air including ionization -plasma densities are compared with experiment. The electromagnetic wave's interaction with the plasma layer is modeled using multi-fluid equations for fluid transport and full Maxwell's equations for the electromagnetic fields. The multi-fluid solver is verified for a whistler wave propagating through a slab. First principles radio communication blackout over a hypersonic vehicle is demonstrated along with a simple blackout mitigation scheme using a magnetic window. Draft copy for AIAA Journal of Spacecraft and Rockets

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Electromagnetic Wave / Magnetoactive Plasma Sheath Interaction for Hypersonic Vehicle Telemetry Blackout Analysis

Cited by 26 publications

References 0 publications

Numerical simulations of high enthalpy flows around entry bodies

Numerical simulations of high enthalpy flows around entry bodies

Numerical Modeling of Plasma Manipulation Using an ExB Layer in the Hypersonic Boundary Layer

Modeling Radio Communication Blackout and Blackout Mitigation in Hypersonic Vehicles

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