TY - JOUR
T1 - Numerical study of a turbulent co-axial non-premixed flame for methanol hydrothermal combustion
T2 - Comparison of the EDC and FGM models
AU - Ren, Mengmeng
AU - Wang, Shuzhong
AU - Romero-Anton, N.
AU - Zhao, Junxue
AU - Zou, Chong
AU - Roekaerts, Dirk
N1 - Accepted Author Manuscript
PY - 2021
Y1 - 2021
N2 - Eddy dissipation concept (EDC) model and flamelet generated manifolds (FGM) model are developed separately to study the temperature profiles and extinction limits of non-premixed hydrothermal flames. Predictions by the two models are evaluated comparatively by experimental data in literatures. FGM model shows relatively better prediction of temperature than EDC model in the near nozzle field. Extinction temperatures can be predicted by EDC model with deviations of 10–33 K. The extinction flow rates predicted by the FGM model are higher than those by the EDC model. Flow fields and reaction source terms are analysed to identify the inherent mechanism leading different results by the two models. It is illustrated that the positive effect of turbulence on reaction rate near the nozzle by the FGM model is the essential reason causing different flame characteristics from the EDC model by which the turbulence only has negative effect on reaction rate.
AB - Eddy dissipation concept (EDC) model and flamelet generated manifolds (FGM) model are developed separately to study the temperature profiles and extinction limits of non-premixed hydrothermal flames. Predictions by the two models are evaluated comparatively by experimental data in literatures. FGM model shows relatively better prediction of temperature than EDC model in the near nozzle field. Extinction temperatures can be predicted by EDC model with deviations of 10–33 K. The extinction flow rates predicted by the FGM model are higher than those by the EDC model. Flow fields and reaction source terms are analysed to identify the inherent mechanism leading different results by the two models. It is illustrated that the positive effect of turbulence on reaction rate near the nozzle by the FGM model is the essential reason causing different flame characteristics from the EDC model by which the turbulence only has negative effect on reaction rate.
KW - Eddy dissipation concept (EDC) model
KW - Extinction limits
KW - Flame temperature profile
KW - Flamelet generated manifolds (FGM) model
KW - Hydrothermal combustion
KW - Turbulence-chemistry interaction
UR - http://www.scopus.com/inward/record.url?scp=85097735367&partnerID=8YFLogxK
U2 - 10.1016/j.supflu.2020.105132
DO - 10.1016/j.supflu.2020.105132
M3 - Article
AN - SCOPUS:85097735367
SN - 0896-8446
VL - 169
JO - Journal of Supercritical Fluids
JF - Journal of Supercritical Fluids
M1 - 105132
ER -