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 - Large-eddy simulation of mixing and combustion in a premixed swirling combustor with synthesis gases
AU - Zheng, Yunzhe
AU - Zhu, Min
AU - Mira Martinez, Daniel
AU - Jiang, Xi
PY - 2013/12/15
Y1 - 2013/12/15
N2 - A lean-premixed swirling combustor with synthesis gases is studied in non-reacting and reacting cases using large-eddy simulation. Code validation and grid dependence test are performed to validate the models and mesh resolution. With the introduction of unmixedness and correlation coefficients in the non-reacting cases, the influence of Reynolds number on recirculation, vorticity breakdown and mixing is studied. In reacting cases, instant and time-averaged scalar fields are examined to study the flame dynamics for a varied fuel composition and operating conditions. The results reveal the effects of hydrogen concentration, Reynolds number, equivalence ratio and pressure on the combustion processes. Conclusions for syngas combustion operation from this work are expected to provide useful information for gas turbine combustor design.
AB - A lean-premixed swirling combustor with synthesis gases is studied in non-reacting and reacting cases using large-eddy simulation. Code validation and grid dependence test are performed to validate the models and mesh resolution. With the introduction of unmixedness and correlation coefficients in the non-reacting cases, the influence of Reynolds number on recirculation, vorticity breakdown and mixing is studied. In reacting cases, instant and time-averaged scalar fields are examined to study the flame dynamics for a varied fuel composition and operating conditions. The results reveal the effects of hydrogen concentration, Reynolds number, equivalence ratio and pressure on the combustion processes. Conclusions for syngas combustion operation from this work are expected to provide useful information for gas turbine combustor design.
KW - LES
KW - Syngas
KW - Unmixedness
KW - Vortex breakdown
KW - Interchangeability
U2 - 10.1016/j.compfluid.2013.04.003
DO - 10.1016/j.compfluid.2013.04.003
M3 - Journal article
VL - 88
SP - 702
EP - 714
JO - Computers and Fluids
JF - Computers and Fluids
SN - 0045-7930
ER -