An Electrodynamic Aerobraking Experiment in a Rarefied Arc-Heated Flow

Katsurayama, Hiroshi; Fukuda, Naofumi; Toyodome, T.; Katoh, Yasuo; Tomita, Kentaro; Matsui, Makoto

doi:10.1007/978-3-319-91017-8_78

Cited by 1 publication

(1 citation statement)

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“…In our preliminary study [18], which measured a single point in front of a non-water-cooled model, we found that subtle distortions of the optical table and optomechanical components due to room temperature variations during the experimental period (sometimes a few days) could lead to misalignment of the optical system, whose path length from the measurement point to the ICCD camera is approximately 5.7 m. Since the measured electron density depends on the intensity ratio of Thomson scattering to Rayleigh scattering (discussed in section 3.1), this misalignment degrades the accuracy of the measured electron density. To overcome this problem, we used an air conditioner to keep the room temperature constant throughout the experimental period.…”

Section: Laser Thomson Scattering Systemmentioning

confidence: 87%

Laser Thomson scattering measurements around magnetized model in rarefied argon arcjet plume

Katsurayama,

Wada,

Moriyama

et al. 2024

J. Inst.

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To elucidate the role of the Hall effect in magnetohydrodynamic (MHD) aerobraking in rarefied flows,we measured the radial distributions of electron temperature and density in front of a magnetized model in a rarefied argon arcjet wind tunnel using the laser Thomson scattering method. We also developed a water-cooled magnetized model to prevent thermal demagnetization during the measurement. The measured electron density distributions were in excellent agreement with computational fluid dynamics (CFD) predictions. It was also found that the magnetic field had little effect on the electron density distribution around the model. In the case without the magnetic field, the measured electron temperature almost agreed with the CFD prediction. However, the measured electron temperature increase caused by applying the magnetic field was about 1,000 K less than that of the CFD prediction. This discrepancy indicates that the location of an insulating boundary in the plasma is far from the model.

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Section: Laser Thomson Scattering Systemmentioning

confidence: 87%