Publikationsdatum:
2019-07-13
Beschreibung:
Spectra of the shock layer radiation incident on the stagnation point of a blunt body placed in an arc-jet wind tunnel were measured over the wavelength range from 600 nm to 880 nm. The test gas was a mixture of 80 percent air and 20 percent argon by mass, and the run was made in a highly nonequilibrium environment. The observed spectra contained contributions from atomic lines of nitrogen, oxygen, and argon, of bound-free and free-free continua, and band systems of N2 and N2(+). The measured spectra were compared with the synthetic spectra, which were obtained through four steps: the calculation of the arc-heater characteristics, of the nozzle flow, of the blunt-body flow, and the nonequilibrium radiation processes. The results show that the atomic lines are predicted approximately correctly, but all other sources are underpredicted by orders of magnitude. A possible explanation for the discrepancy is presented.
Schlagwort(e):
AERODYNAMICS
Materialart:
AIAA PAPER 94-0086
,
Aerospace Sciences Meeting; Jan 10, 1994 - Jan 13, 1994; Reno, NV; United States|MCAT Inst., Planetary Entry Experiments; 11 p
Format:
application/pdf
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