9th International Workshop on Radiation of High Temperature Gases for Space Missions

Modeling of Hypervelocity Air Flows Up to 25km/s

13 Sept 2022, 11:20

20m

Auditório (Biblioteca Municipal - Santa Maria - Azores -Portugal)

Meteorites

Speaker

Mario Lino da Silva (Instituto de Plasmas e Fusão Nuclear - Instituto Superior Tecnico)

Description

We have modeled hypervelocity high-temperature flows in the 8--25 km/s range, considering a gas mixture of 15 species (\ce{N2}, \ce{O2}, \ce{NO}, \ce{N2+}, \ce{O2+}, \ce{NO+}, \ce{N}, \ce{O}, \ce{N+}, \ce{O+}, \ce{N++}, \ce{O++}, \ce{N+++}, \ce{O+++}, \ce{e-}). Atomic and molecular species internal levels spectroscopic data was compiled, with reconstruction of molecular potential curves and determination of the corresponding rovibronic levels. Partition functions were calculated and the determined thermodynamic properties for those species were updated and fitted to a temperature range up to 100,000 K. For chemical kinetics, the impact of adding double and triple ionization for atoms was also evaluated.

Summary

We have modeled hypervelocity high-temperature flows in the 8--25 km/s range, considering a gas mixture of 15 species (\ce{N2}, \ce{O2}, \ce{NO}, \ce{N2+}, \ce{O2+}, \ce{NO+}, \ce{N}, \ce{O}, \ce{N+}, \ce{O+}, \ce{N++}, \ce{O++}, \ce{N+++}, \ce{O+++}, \ce{e-}). Atomic and molecular species internal levels spectroscopic data was compiled, with reconstruction of molecular potential curves and determination of the corresponding rovibronic levels. Partition functions were calculated and the determined thermodynamic properties for those species were updated and fitted to a temperature range up to 100,000 K. For chemical kinetics, the impact of adding double and triple ionization for atoms was also evaluated.