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Comparisons of Air Radiation Model with Shock Tube MeasurementsThis paper presents an assessment of the predictive capability of shock layer radiation model appropriate for NASA s Orion Crew Exploration Vehicle lunar return entry. A detailed set of spectrally resolved radiation intensity comparisons are made with recently conducted tests in the Electric Arc Shock Tube (EAST) facility at NASA Ames Research Center. The spectral range spanned from vacuum ultraviolet wavelength of 115 nm to infrared wavelength of 1400 nm. The analysis is done for 9.5-10.5 km/s shock passing through room temperature synthetic air at 0.2, 0.3 and 0.7 Torr. The comparisons between model and measurements show discrepancies in the level of background continuum radiation and intensities of atomic lines. Impurities in the EAST facility in the form of carbon bearing species are also modeled to estimate the level of contaminants and their impact on the comparisons. The discrepancies, although large is some cases, exhibit order and consistency. A set of tests and analyses improvements are proposed as forward work plan in order to confirm or reject various proposed reasons for the observed discrepancies.
Document ID
20100024218
Acquisition Source
Ames Research Center
Document Type
Conference Paper
Authors
Bose, Deepak (NASA Ames Research Center Moffett Field, CA, United States)
McCorkle, Evan (North Carolina State Univ. Raleigh, NC, United States)
Bogdanoff, David W. (Eloret Corp. Moffett Field, CA, United States)
Allen, Gary A., Jr. (Eloret Corp. Moffett Field, CA, United States)
Date Acquired
August 24, 2013
Publication Date
January 5, 2009
Subject Category
Space Sciences (General)
Report/Patent Number
ARC-E-DAA-TN305
Meeting Information
Meeting: 47th AIAA Aerospace Sciences Meeting and Exhibit
Location: Orlando, FL
Country: United States
Start Date: January 5, 2009
End Date: January 8, 2009
Sponsors: American Inst. of Aeronautics and Astronautics
Funding Number(s)
CONTRACT_GRANT: NNA04BC25C
Distribution Limits
Public
Copyright
Public Use Permitted.

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