Effect of dimethyl ether blending on methane flame morphology transformation and stabilization mechanism in a micro-planar combustor

被引:2
|
作者
Gao, Lingjie [1 ]
Tang, Aikun [1 ]
Huang, Qiuhan [1 ]
Li, Chong [1 ]
机构
[1] Jiangsu Univ, Sch Energy & Power Engn, Zhenjiang 212013, Peoples R China
基金
中国国家自然科学基金;
关键词
Micro; -combustion; Flame transformation; Blended fuel; Strengthening mechanism; CATALYTIC COMBUSTION; HYDROGEN ADDITION; THERMAL PERFORMANCE; PREMIXED METHANE; MIXTURES; INSTABILITIES; SUPPRESSION; STABILITY; IGNITION; CHANNEL;
D O I
10.1016/j.cep.2023.109570
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
This paper presented a novel blended combustion solution for mixing methane/dimethyl ether/air in a micro combustion chamber. Simulations were used to compare the pure methane combustion with the blended combustion, focusing on the OH species distribution, y-axis velocity, and strain rate to reveal the flame dynamics differences in different combustion conditions. The results showed that the blowout limit was enhanced from 0.53 m/s to 1.18 m/s at a blending ratio of 50 %. The blending of DME was also beneficial in weakening the flame asymmetry, delaying the generation of inclined flames in the original combustion, and replacing the inclined flames by a double-peaked U-shaped flame and an inverted U-shaped flame at an equivalence ratio of 0.9. Overall, this study not only provides a reliable fuel mixture for enhancing the combustion process under microscale conditions, but also reveals the flame transition characteristics.
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页数:13
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