@Article{cmes.2020.08825,
AUTHOR = {Zaiguo Fu, Huanhuan Gao, Zhuoxiong Zeng, Jiang Liu},
TITLE = {Numerical Analysis on Multi-Field Characteristics and Synergy in a Large-Size Annular Combustion Chamber with Double Swirlers},
JOURNAL = {Computer Modeling in Engineering \& Sciences},
VOLUME = {122},
YEAR = {2020},
NUMBER = {3},
PAGES = {805--830},
URL = {http://www.techscience.com/CMES/v122n3/38376},
ISSN = {1526-1506},
ABSTRACT = {In order to comprehensively evaluate the flow and heat transfer performance 
of a large-size annular combustion chamber of a heavy-duty gas turbine, we carried out 
numerical computation and analyses on the velocity, temperature and pressure fields in 
the chamber with double swirlers. The mathematical model of the coupling combustion, 
gas flow, and heat transfer process was established. The influences of the inlet swirling 
strength, fuel-air ratio and temperature of the premixed gas on the multi-field 
characteristics and synergy were investigated on the basis of field synergy theory. The 
results showed that the central recirculation zone induced by the inlet swirling flow 
grows downstream in the combustion chamber. The velocity and temperature in the outlet 
section of the chamber tend to be uniform due to the upstream improved synergy. The 
outer swirl number of the premixed gas flow has a great influence on the comprehensive 
flow and heat transfer performance of the combustion chamber. The synergy angles 
change towards benefiting the synergy between velocity and temperature fields with the 
increasing swirl numbers and inlet gas temperature while the velocity-pressure synergy 
becomes poor. The increasing fuel-air ratio of premixed gas leads to different trends of 
the velocity-temperature synergy and velocity-pressure synergy. The comprehensive 
synergy representing the low-resistance heat transfer performance is evidently dominated 
mainly by the velocity-temperature synergy.},
DOI = {10.32604/cmes.2020.08825}
}