Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Direct numerical simulation of nonpremixed syngas burning with detailed chemistry
AU - Ranga Dinesh, K.K.J.
AU - Jiang, Xi
AU - van Oijen, J. A.
PY - 2013/5
Y1 - 2013/5
N2 - H2/CO syngas non-premixed impinging jet flames were studied using three-dimensional direct numerical simulation (DNS) and flamelet generated manifolds (FGMs) based on detailed chemical kinetics. The computational domain employed has a size of four jet nozzle diameters in the streamwise direction and 12 jet nozzle diameters in the cross-streamwise direction. The results presented in this study were performed using a uniform Cartesian grid with 200 × 600 × 600 points. The Reynolds number used was Re = 2000, based on the reference quantities. The spatial discretisation was carried out using a sixth-order accurate compact finite difference scheme and the discretised equations were time-advanced using a third-order accurate fully explicit compact-storage Runge–Kutta scheme. Results show that the ratio of H2 and CO in the syngas mixture significantly affects the flame characteristics including the near-wall flame structure. The high diffusivity of H2-rich syngas flame leads to form weaker vortices and a thicker flame. In contrast, CO-rich syngas flame leads to form a thinner flame with strong wrinkles. Moreover, the DNS results suggest that the preferential diffusion influences the local flame structure for the simulated low Reynolds number H2 flame.
AB - H2/CO syngas non-premixed impinging jet flames were studied using three-dimensional direct numerical simulation (DNS) and flamelet generated manifolds (FGMs) based on detailed chemical kinetics. The computational domain employed has a size of four jet nozzle diameters in the streamwise direction and 12 jet nozzle diameters in the cross-streamwise direction. The results presented in this study were performed using a uniform Cartesian grid with 200 × 600 × 600 points. The Reynolds number used was Re = 2000, based on the reference quantities. The spatial discretisation was carried out using a sixth-order accurate compact finite difference scheme and the discretised equations were time-advanced using a third-order accurate fully explicit compact-storage Runge–Kutta scheme. Results show that the ratio of H2 and CO in the syngas mixture significantly affects the flame characteristics including the near-wall flame structure. The high diffusivity of H2-rich syngas flame leads to form weaker vortices and a thicker flame. In contrast, CO-rich syngas flame leads to form a thinner flame with strong wrinkles. Moreover, the DNS results suggest that the preferential diffusion influences the local flame structure for the simulated low Reynolds number H2 flame.
KW - Syngas combustion
KW - Preferential diffusion
KW - Impinging jet
KW - DNS
KW - FGM
U2 - 10.1016/j.fuel.2013.01.014
DO - 10.1016/j.fuel.2013.01.014
M3 - Journal article
VL - 107
SP - 343
EP - 355
JO - Fuel
JF - Fuel
SN - 1873-7153
ER -