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Proceedings of CHT-17 ICHMT International Symposium on Advances in Computational Heat Transfer
May 28 - June 1, 2017, Napoli, Italy

DOI: 10.1615/ICHMT.2017.CHT-7


ISBN Print: 9781-56700-4618

ISSN: 2578-5486

LINE-BY-LINE RANDOM-NUMBER DATABASE FOR MONTE CARLO SIMULATIONS OF RADIATION IN COMBUSTION SYSTEM

pages 583-596
DOI: 10.1615/ICHMT.2017.CHT-7.560
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摘要

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 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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