S1904-1-4 炭酸ガスアークプラズマフリージェット流中の炭化ケイ素材料の加熱実験(大気突入・減速技術(1),社会変革を技術で廻す機械工学)

概要

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Arc heated ground testing facility produce high enthalpy and high temperature gas flow which are used to investigate for purposes as thermal protection testing of reentry flow into the other planet. The emission spectra profiles in shock layer of the ablation materials are spectroscopically measured for CO_2 arc plasma flow. Vibrational temperature obtained from Boltzmann plot method for C_2 SWAN at 20mm upstream of the sonic throat and shock layer in bow shock around the blunt body. The d^3Π_g-a^3Π_u transition of Δυ=0 of C_2 SWAN, is referred from 509 to 516 nm. Vibrational temperature is determined to be 3500 K of SiC from band head ratio of incline to (0,0)-(2,2) of the C_2 SWAN band system emission. Virgin structure can be seen in the crystallization and lapping defect on surface, while structure after arc heating is changed recrystallization due to high enthalpy CO_2 gas flow.
2010-09-04