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Analysis of Shockwave Radiation Data in NitrogenData 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.




Document ID
20190027603
Acquisition Source
Ames Research Center
Document Type
Conference Paper
Authors
Cruden, Brett A.
(Analytical Mechanics Associates, Inc. Moffett Field, CA, United States)
Brandis, Aaron M.
(Analytical Mechanics Associates, Inc. Moffett Field, CA, United States)
Date Acquired
July 23, 2019
Publication Date
June 17, 2019
Subject Category
Plasma Physics
Report/Patent Number
ARC-E-DAA-TN68980
Meeting Information
Meeting: AIAA AVIATION Forum
Location: Dallas, TX
Country: United States
Start Date: June 17, 2019
End Date: June 21, 2019
Sponsors: American Institute of Aeronautics and Astronautics (AIAA)
Funding Number(s)
CONTRACT_GRANT: NNA15BB15C
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
Nitrogen
Shock Tube
Spectroscopy
Re-entry
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