The influence of gas radiation on the thermal behavior of a 2D axisymmetric turbulent non-premixed methane–air flame

Evaluation of gas radiation heat transfer in a 2D axisymmetric geometry using the line-by-line integration and WSGG models

“…The temperature and concentration fields are based on the solution of a global simulation of a turbulent methane flame in a cylindrical chamber [23]. The WSGG models are based on the correlations provided in [4], for a constant molar concentration ratio of x H2O /x CO2 = 2, and on [8] for arbitrary concentration ratios.…”

“…In particular, axisymmetric chambers have received extensive attention [22][23][24][25][26][27][28][29][30][31] because they are practically relevant, and provide realistic two dimensional effects. In these studies, several gas models have been analyzed or compared under different conditions.…”

Numerical simulations of the radiative transfer in a 2D axisymmetric turbulent non-premixed methane–air flame using up-to-date WSGG and gray-gas models

“…The investigation in Silva et al [23], which considered the same combustion chamber, provided the relative importance of the combustion kinetics by computing the Damköhler number, and found that the combustion process is governed by Arrhenius rates in the flame core and by Magnussen's rates in all the other regions. This formulation was also successfully employed in [21][22][23]25]. Also, the chemistry described above does not involve soot formation/oxidation, considering that the methane flame is low sooting.…”

“…For evaluation of the proposed solution, the case described in [20] was studied, since detailed spatial measurements are available for the main gas species concentrations and for the temperature field. Previous works demonstrated: (1) the importance of using updated WSGG coefficients for constant ratios of partial pressures of H 2 O and CO 2 in relation to old coefficients [21]; and (2) the importance of computing TRI effects [22]. The present study investigates the effect of using different WSGG models: CR-WSGG, which considers a constant ratio between the H 2 O and CO 2 partial pressures, and the NCR-WSGG, which considers a non-constant ratio.…”

Um estudo numérico da influência da radiação sobre a turbulência em uma chama turbulenta 2D axissimétrica

“…The investigation in Silva et al (2007), which considered the same combustion chamber, provided the relative importance of the combustion kinetics by computing the Damköhler number, and found that the combustion process is governed by Arrhenius rates in the flame core and by Magnussen's rates in all the other regions. This formulation was also successfully employed in Silva et al (2007), Nieckele et al (2001) and Centeno et al (2013Centeno et al ( , 2014a.…”