Frequency-Dependent FDTD Simulation of the Interaction of Microwaves With Rocket-Plume

Kinefuchi, Kiyoshi; Funaki, Ikkoh; Abe, Takashi

doi:10.1109/tap.2010.2055796

Cited by 20 publications

(10 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the other hand, the FD2TD method is effective for the numerical simulation of Maxwell's equations in such frequencydependent media. In fact, Kinefuchi et al [23] reported that FD2TD computational results of microwave propagation around a rocket plume showed good agreement with the experimental results. In addition, Cummer [24] proposed two effective FDTD methods for isotropic cold plasma.…”

Section: Electromagnetic Wavementioning

confidence: 78%

Examination of Radio Frequency Blackout for an Inflatable Vehicle During Atmospheric Reentry

Takahashi

Yamada

Abe

2014

Journal of Spacecraft and Rockets

Self Cite

View full text Add to dashboard Cite

Numerical simulations of the plasma flow and electromagnetic wave around a membraneaeroshell type reentry vehicle were performed using various physical model combinations, and the possibility of radio frequency blackout of transceiver antenna embedded at the rear of the vehicle was investigated. The flow field was assumed to be in thermochemical nonequilibrium, and it was described by the Navier-Stokes equations with a multitemperature model and the equation of state. The simulations were performed for several altitudes including the highest heat flux point according to reentry orbit data. Through these computations, the detailed distributions of the flow-field properties in the shock layer and wake region were successfully obtained. To evaluate possibility of the radio frequency blackout during atmospheric reentry, the distribution of the electron number density around the inflatable vehicle was clarified. A frequency-dependent finite-difference time-domain method was used for simulations of electromagnetic waves, and the physical properties were obtained from the computational results of the plasma flow calculation. Electromagnetic wave behaviors in an ionized gas region behind the inflatable vehicle were investigated. It was found that the number density of electrons was sufficiently small and that the electromagnetic waves can propagate with less reflection and no attenuation. These results suggest that radio frequency blackout may not occur during the atmospheric reentry of the inflatable vehicle.

show abstract

Section: Electromagnetic Wavementioning

confidence: 78%

Examination of Radio Frequency Blackout for an Inflatable Vehicle During Atmospheric Reentry

Takahashi

Yamada

Abe

2014

Journal of Spacecraft and Rockets

Self Cite

View full text Add to dashboard Cite

show abstract

“…To clarify the behaviour of electromagnetic waves in the plasma flow around the reentry vehicle, computational fluid dynamics (CFD) and computational electromagnetics are effective techniques. Regarding the prediction of electromagnetic waves in a frequency-dependent medium such as plasma, the frequencydependent finite-difference time-domain (FD2TD) method [9] is useful for determining the propagation of microwaves around a rocket plume [10] or that of electromagnetic waves in isotropic cold plasma [11].…”

Section: Introductionmentioning

confidence: 99%

Advanced validation of CFD-FDTD combined method using highly applicable solver for reentry blackout prediction

Takahashi¹

2015

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

An analysis model of plasma flow and electromagnetic waves around a reentry vehicle for radio frequency blackout prediction during aerodynamic heating was developed in this study. The model was validated based on experimental results from the radio attenuation measurement program. The plasma flow properties, such as electron number density, in the shock layer and wake region were obtained using a newly developed unstructured grid solver that incorporated real gas effect models and could treat thermochemically non-equilibrium flow. To predict the electromagnetic waves in plasma, a frequency-dependent finite-difference time-domain method was used. Moreover, the complicated behaviour of electromagnetic waves in the plasma layer during atmospheric reentry was clarified at several altitudes. The prediction performance of the combined model was evaluated with profiles and peak values of the electron number density in the plasma layer. In addition, to validate the models, the signal losses measured during communication with the reentry vehicle were directly compared with the predicted results. Based on the study, it was suggested that the present analysis model accurately predicts the radio frequency blackout and plasma attenuation of electromagnetic waves in plasma in communication.

show abstract

“…On the other hand, the frequency-dependent finite-difference time-domain (FD2TD) method [4] is also an effective tool for simulating electromagnetic waves in a frequency-dependent medium (e.g., plasma) whose dielectric constant and electrical conductivity vary over a frequency range. In fact, Kinefuchi et al [5] reported that the FD2TD computational results for the microwave propagation around a rocket plume showed good agreement with experimental results. Cummer [6] proposed two effective FDTD methods for isotropic cold plasma.…”

Section: Introductionmentioning

confidence: 84%

Prediction Performance of Blackout and Plasma Attenuation in Atmospheric Reentry Demonstrator Mission

Takahashi

Yamada

Abe

2014

Journal of Spacecraft and Rockets

Self Cite

View full text Add to dashboard Cite

A numerical simulation model that combines the plasma flows and electromagnetic waves around a reentry vehicle during atmospheric reentry was developed to evaluate the radio frequency blackout and plasma attenuation. The physical properties of the plasma flow in the shock layer and wake region were obtained using a computational fluid dynamics technique. The electromagnetic waves were expressed using a frequencydependent finite-difference time-domain method with the plasma properties. Combined simulations were performed for the atmospheric reentry demonstrator of the European Space Agency at various altitudes based on reentry orbit data. The electromagnetic wave behaviors around the vehicle during atmospheric reentry were investigated in detail. Moreover, a parametric analysis with different ionization reaction models was performed. It was confirmed that the vehicle is surrounded by the plasma and the propagation of the electromagnetic waves is prevented at high altitude. Then, the plasma is dissipated, and the propagation recovers at low altitude. Validation of the simulation model was performed based on the plasma attenuation history of the experimental flight data. A comparison of the measured and predicted results showed good agreement. It was concluded that the combined simulation model could be an effective tool for investigating the radio frequency blackout and the plasma attenuation of radio wave communication.

show abstract

Frequency-Dependent FDTD Simulation of the Interaction of Microwaves With Rocket-Plume

Cited by 20 publications

References 11 publications

Examination of Radio Frequency Blackout for an Inflatable Vehicle During Atmospheric Reentry

Examination of Radio Frequency Blackout for an Inflatable Vehicle During Atmospheric Reentry

Advanced validation of CFD-FDTD combined method using highly applicable solver for reentry blackout prediction

Prediction Performance of Blackout and Plasma Attenuation in Atmospheric Reentry Demonstrator Mission

Contact Info

Product

Resources

About