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Analysis of Shockwave Radiation Data in NitrogenData from test series in the Electric Arc Shock Tube Facility were previously reportedfor velocities spanning 6-12 km/s in pure N2 at a freestream pressure of 0.2 Torr. The testseries provided spectrally- and spatially-resolved data for validation of a number of modelsof physical phenomena, including vibrational relaxation, molecular radiation, nitrogendissociation and ionization, and atomic radiation and ionization. In the present workanalysis of data obtained at a nominal velocity of 10.3 km/s is discussed in detail. Spectraare analyzed to extract temperatures and the densities of excited states as a function ofposition behind the shock. The effect of different methods for calculating state populationsand ionization processes is assessed, as is a rigorous assessment of the atomic line lists, withboth missing and extra lines identified.
Document ID
20190028342
Acquisition Source
Ames Research Center
Document Type
Presentation
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 30, 2019
Publication Date
June 17, 2019
Subject Category
Plasma Physics
Report/Patent Number
ARC-E-DAA-TN70003
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.
Technical Review
Single Expert
Keywords
Re-entry
Spectroscopy
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