TY - GEN
T1 - Comparison of accuracy and computational expense of radiation models in simulation of non-premixed turbulent jet flames
AU - Pal, Gopalendu
AU - Gupta, Ankur
AU - Modest, Michael F.
AU - Haworth, Daniel C.
N1 - Funding Information:
This research was primarily supported by the National Aeronautics and Space Administration (NASA) under the research Grant # NNX07AB40A . The P-3 approach presented here was developed by the senior author (mfm) while at the University of Karlsruhe, Germany in the framework of a Humboldt Research Award. The authors acknowledge the support provided by NASA, University of Karlsruhe and Alexander von Humboldt Foundation. The authors also like to thank the High Performance Computing Group of the University of California, San Diego for providing access to Triton, a high performance computational cluster.
PY - 2011
Y1 - 2011
N2 - The accuracy and computational expense of various radiation models in the simulation of turbulent jet flames are compared. Both nonluminous and luminous methane-air non- premixed turbulent jet flames are simulated using a comprehensive combustion solver. The combustion solver consists of a finite-volume/probability density function-based flow-chemistry solver interfaced with a high-accuracy spectral radiation solver. Flame simulations were performed using various k-distribution- based spectral models and radiative transfer equation (RTE) solvers, such as P-1, P-3, finite volume/discrete ordinates method (FVM/DOM), and Photon Monte Carlo (PMC) methods, with/without the consideration of turbulence-radiation interaction (TRI). TRI is found to drop the peak temperature by close to 150 K for a luminous flame (optically thicker) and 25-100 K for a nonluminous flame (optically thinner). RTE solvers are observed to have stronger effects on peak flame temperature, total radiant heat source and NO emission than the spectral models. P-1 is found to be the computationally least expensive RTE solver and the FVM the most expensive for any spectral model. For optically thinner flames all radiation models yield excellent accuracy. For optically thicker flames P-3 and FVM predict radiation more accurately than the P-1 method when compared to the benchmark line-by-line (LBL) PMC.
AB - The accuracy and computational expense of various radiation models in the simulation of turbulent jet flames are compared. Both nonluminous and luminous methane-air non- premixed turbulent jet flames are simulated using a comprehensive combustion solver. The combustion solver consists of a finite-volume/probability density function-based flow-chemistry solver interfaced with a high-accuracy spectral radiation solver. Flame simulations were performed using various k-distribution- based spectral models and radiative transfer equation (RTE) solvers, such as P-1, P-3, finite volume/discrete ordinates method (FVM/DOM), and Photon Monte Carlo (PMC) methods, with/without the consideration of turbulence-radiation interaction (TRI). TRI is found to drop the peak temperature by close to 150 K for a luminous flame (optically thicker) and 25-100 K for a nonluminous flame (optically thinner). RTE solvers are observed to have stronger effects on peak flame temperature, total radiant heat source and NO emission than the spectral models. P-1 is found to be the computationally least expensive RTE solver and the FVM the most expensive for any spectral model. For optically thinner flames all radiation models yield excellent accuracy. For optically thicker flames P-3 and FVM predict radiation more accurately than the P-1 method when compared to the benchmark line-by-line (LBL) PMC.
UR - http://www.scopus.com/inward/record.url?scp=85087246059&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85087246059&partnerID=8YFLogxK
U2 - 10.1115/ajtec2011-44585
DO - 10.1115/ajtec2011-44585
M3 - Conference contribution
AN - SCOPUS:85087246059
SN - 9780791838921
T3 - ASME/JSME 2011 8th Thermal Engineering Joint Conference, AJTEC 2011
BT - ASME/JSME 2011 8th Thermal Engineering Joint Conference, AJTEC 2011
PB - American Society of Mechanical Engineers
T2 - ASME/JSME 2011 8th Thermal Engineering Joint Conference, AJTEC 2011
Y2 - 13 March 2011 through 17 March 2011
ER -