Line-by-line random-number database for Monte Carlo simulations of radiation in combustion system

[+] Author and Article Information
Tao Ren

Member of ASME, School of Engineering, University of California, Merced, Merced, California, 95343

Michael F. Modest

Life fellow of ASME, School of Engineering, University of California, Merced, Merced, California, 95343

1Corresponding author.

ASME doi:10.1115/1.4041803 History: Received July 23, 2018; Revised September 21, 2018


With today's computational capabilities, it has become possible to conduct line-by-line accurate radiative heat transfer calculations in spectrally highly nongray combustion systems using the Monte Carlo method. In these calculations, wavenumbers carried by photon bundles must be determined in a statistically meaningful way. The wavenumbers for the emitting photons are found from a database, which tabulates wavenumber--random number relations for each species. In order to cover most conditions found in industrial practices, a database tabulating these relations for CO2, H2O, CO, CH4, C2H4 and soot is constructed to determine emission wavenumbers and absorption coefficients for mixtures at temperatures up to 3000 K and total pressures up to 80 bar. The accuracy of the database is tested by reconstructing absorption coefficient spectra from the tabulated database. One-dimensional test cases are used to validate the database against analytical LBL solutions. Sample calculations are also conducted for a luminous flame and a gas turbine combustion burner. The database is available from the author's website upon request at http://eng.ucmerced.edu/people/mmodest

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