Numerical study on the combustion characteristics in a porous-free flame burner for lean mixtures

被引:4
|
作者
Ghorashi, Seyed Amin [1 ]
Hashemi, Seyed Mohammad [1 ]
Hashemi, Seyed Abdolmehdi [1 ]
Mollamandi, Mandi [1 ]
机构
[1] Univ Kashan, Dept Mech Engn, Kashan, Iran
关键词
Porous-free flame burner; experimental test; numerical simulation; combustion characteristics; flame stability; PREMIXED COMBUSTION; METHANE/AIR COMBUSTION; HEAT-TRANSFER; STABILIZATION; PERFORMANCE; RADIATION; EMISSIONS; MEDIA; AIR;
D O I
10.1177/0954406219884979
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
The present work implements a numerical simulation to investigate the combustion process in a porous-free flame burner. The non-equilibrium thermal condition is performed, and discretization and solving of the governing equations are conducted in a two-dimensional axisymmetric model. In order to simulate the combustion process, a reduced chemical kinetic mechanism of GRI 3.0, which includes 16 species and 41 reactions, is used. In order to prove the precision of the numerical method, some experimental tests are carried out and the numerical results are in a good agreement with the experimental measurements. The numerical results demonstrate that the porous-free flame burner has a higher flame stability compared to the conventional porous burner and the radiative efficiency of the porous-free flame burner is less than the porous burner. In addition, an increase in thermal conduction of the porous medium leads to an extension in the flame stability. In addition, the results show that with decreasing the pore density of porous medium, the flame stability is extended.
引用
收藏
页码:935 / 945
页数:11
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