In this paper, efficient spectral modules and random number databases are developed for atomic and diatomic species for use in photon Monte Carlo (PMC) modeling of hypersonic nonequilibrium flow radiation. To model nonequilibrium flow conditions, the quasi steady state (QSS) assumption was used to generate electronic state populations of atomic and diatomic gas species in the databases. For atomic species (N and O), both bound-bound transitions and continuum radiation were included, and were separately databased as a function of electron temperature and number density as well as the ratio of atomic ion to neutral number density. For the radiating diatomic species of , N2, O2, and NO, databases were generated for each electronic molecular electronic system. In each molecular electronic system, the ro-vibrational transition lines were separately databased for each electronic upper state population forming the electronic system. The spectral module for the PMC method was optimized toward computational efficiency for emission calculations, wavelength selections of photon bundles and absorption coefficient calculations in the ray tracing scheme.
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ASME 2009 Heat Transfer Summer Conference collocated with the InterPACK09 and 3rd Energy Sustainability Conferences
July 19–23, 2009
San Francisco, California, USA
Conference Sponsors:
- Heat Transfer Division
ISBN:
978-0-7918-4356-7
PROCEEDINGS PAPER
Spectral Module for Photon Monte Carlo Calculations in Hypersonic Nonequilibrium Radiation
Takashi Ozawa,
Takashi Ozawa
The Pennsylvania State University, University Park, PA
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Michael F. Modest,
Michael F. Modest
The Pennsylvania State University, University Park, PA
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Deborah A. Levin
Deborah A. Levin
The Pennsylvania State University, University Park, PA
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Takashi Ozawa
The Pennsylvania State University, University Park, PA
Michael F. Modest
The Pennsylvania State University, University Park, PA
Deborah A. Levin
The Pennsylvania State University, University Park, PA
Paper No:
HT2009-88599, pp. 421-430; 10 pages
Published Online:
March 12, 2010
Citation
Ozawa, T, Modest, MF, & Levin, DA. "Spectral Module for Photon Monte Carlo Calculations in Hypersonic Nonequilibrium Radiation." Proceedings of the ASME 2009 Heat Transfer Summer Conference collocated with the InterPACK09 and 3rd Energy Sustainability Conferences. Volume 1: Heat Transfer in Energy Systems; Thermophysical Properties; Heat Transfer Equipment; Heat Transfer in Electronic Equipment. San Francisco, California, USA. July 19–23, 2009. pp. 421-430. ASME. https://doi.org/10.1115/HT2009-88599
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