Visual investigation on optimizing combustion characteristic of porous media burner combined with bluff body

被引:0
作者
Dai, Huaming [1 ,2 ,4 ]
Dai, Hongchao [1 ]
Zhang, Bingqian [1 ,3 ]
机构
[1] Wuhan Univ Technol, Sch Safety Sci & Emergency Management, Wuhan, Peoples R China
[2] Natl Univ Singapore, Dept Mech Engn, Singapore, Singapore
[3] Anhui Xinhua Univ, Sch Urban Construct, Hefei, Peoples R China
[4] Wuhan Univ Technol, Sch Safety Sci & Emergency Management, Wuhan 430070, Peoples R China
基金
中国国家自然科学基金;
关键词
Porous media; Bluff body; Combustion wave propagation; Radiation efficiency; Coalbed methane; MICRO-COMBUSTOR; FILTRATION COMBUSTION; FLAME STABILITY; AIR; PERFORMANCE; SHAPE; FUEL; GAS;
D O I
10.1080/15567036.2023.2224268
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
Coalbed methane as an unconventional natural gas is suitable for the utilization in thermal photovoltaic systems through optimized burners. In order to improve the radiation and utilization efficiency of coalbed methane, a combination of bluff body and porous media was proposed. Moreover, the bluff body spacing and porous media structure were changed to analyze the influence on flame characteristics. The results showed that the maximum temperature and radiation efficiency increased with decreasing of bluff body spacing. When the bluff body spacing was 30 mm, the maximum temperature of 933 K was obtained, and the radiation efficiency increased by 68%. The increase of the equivalence ratio also improved the radiation efficiency, and the maximum radiation efficiency was 14.5% at phi = 0.90. In addition, the increase of inlet velocity and bluff body spacing was beneficial to downstream flame propagation, but had a negative effect on upstream propagation. At v (in) = 40 cm/s, the maximum downstream propagation velocity was 0.267 mm/s. Due to the difference in thermal conductivity, flame fragmentation occurred in the 8 mm pellets, but the flame propagation was gradually stable with the increase of bluff body temperature.
引用
收藏
页码:7972 / 7986
页数:15
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