| Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2014: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Outline of Final Research Achievements |
An analysis model of plasma flow and electromagnetic waves around a reentry vehicle for radio frequency blackout prediction was developed. The plasma flow properties 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 nonequilibrium flow. To predict the electromagnetic waves in plasma layer, a frequency-dependent finite-difference time-domain method was used. The combined model was validated based on experimental results in atmospheric reentry missions. The prediction performance of the combined model was evaluated with profiles and peak values of the electron number density. The signal losses measured during communication were directly compared with the predicted results. Based on the study, it is suggested that the analysis model could be an effective tool for investigating radio frequency blackout and plasma attenuation in radio wave communication.
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