MALALASEKERA, W. ...et al., 2009. Evaluation of turbulence/radiation effects using LES combustion simulation data. IN: IN: Colelho, P. ... et al (eds.). Proceedings of Eurotherm83 – Computational Thermal Radiation in Participating Media III, 15-17 April 2009, Lisboa, Portugal, pp. 221-233.
This paper describes the evaluation of turbulence/radiation effects on a swirl flame. The data
obtained from a LES calculation in this case provides time-varying temperature field and species
concentrations contributing to radiation fluctuations. In the radiation calculations demonstrated
here, time varying data obtained from the LES calculations are post processed using the Discrete
Transfer method incorporating a radiative property calculation algorithm to obtain radiation
fluctuation statistics. The study provides an insight into how radiation fluxes, absorption
coefficients and radiation intensities fluctuate in a highly turbulent complex practical flame.
Simulation results show that temperature self correlation can be as high as 4 times and turbulence
fluctuations has a very significant effect on source term calculations.
This conference paper was presented at Eurotherm Seminar 83 and the proceedings were published by IST Press: http://istpress.ist.utl.pt/