Analysis of Shockwave Radiation Data in Nitrogen

[摘要] Data from a pure nitrogen test series in the Electric Arc Shock Tube Facility were previously reported for velocities spanning 6-12 km/s at a free-stream pressure of 0.2 Torr. This test series provides validation data for a range of physical phenomena to investigate, including vibrational relaxation, molecular radiation, nitrogen dissociation and ionization, and atomic radiation and ionization. This paper details analysis of data obtained at a nominal velocity of 10.3 km/s. The spectra are analyzed to extract temperatures and the densities of excited states as a function of position behind the shock. The effect of different methods for calculating state populations and ionization processes is assessed, as is a rigorous assessment of the atomic line lists, with both missing and extra lines identified.

[发布日期] 2019-06-17

[学科分类] 原子、分子光学和等离子物理

[关键词] ATOMIC SPECTRA;COLLISION RATES;CONTAMINANTS;ELECTRIC ARCS;GAS DISSOCIATION;HIGH RESOLUTION;IONIZATION;MOLECULAR GASES;NITROGEN;PHYSICAL FACTORS;REACTION KINETICS;SHOCK TUBES;SHOCK WAVE INTERACTION;SPATIAL RESOLUTION