Computer Science
Scientific paper
Dec 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003esasp.533...39k&link_type=abstract
In: Proceedings of the First International Workshop on Radiation of High Temperature Gases in Atmospheric Entry, 8-10 October 20
Computer Science
Space Probes, Earth Atmosphere, Mars Atmosphere
Scientific paper
Comparative tests using the TPS basic material SiC were performed in the hypersonic high entalpy flow field of the arc heated facility L2K for Martian and air atmosphere on a stagnation point model. Gas properties in the flow fields were characterized by emission spectra from the shock region in the wavelength range from 200 to 850 nm in air and Martian atmosphere at comparable gas mass flow rate and reservoir pressure levels. Signals due to NO molecules, N- and O- atoms are present in both martian and earth like atmospheres, while strong signals due to CN, C2 and C appear only in the spectra with CO2/N2 gas composition. Cold wall heat flux rates were probed using a Heat Flux Microsensor (HFM) based on thermopile technique. Completely different cold wall heat flux rates and surface temperature development on a SiC-probe were measured. Different modes of oxygen atom recombination explain the differences between the two atmospheres.
Esser Bernd
Gölhan A.
Koch U.
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