Comparison of combustion efficiency between micro combustors with single- and double-layered walls: A numerical study

被引：51
作者：
Fan, Aiwu [1 ]
Li, Linhong [1 ]
Yang, Wei [1 ]
Yuan, Zili [1 ]
机构：
[1] Huazhong Univ Sci & Technol, State Key Lab Coal Combust, Wuhan 430074, Hubei, Peoples R China
来源：
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION | 2019年 / 137卷
基金：
中国国家自然科学基金;
关键词：
Micro-combustor; Double-layered wall; Heat recirculation; Heat loss; Combustion efficiency; Flame tip opening; PLATE FLAME HOLDER; BLOW-OFF LIMIT; HEAT RECIRCULATION; THERMAL PERFORMANCE; CATALYTIC COMBUSTION; HYDROGEN-AIR; STABILITY; DYNAMICS; CH4/AIR; STABILIZATION;
D O I：
10.1016/j.cep.2019.02.004
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：
In this study, a micro combustor with double-layered walls was proposed for micro energy and power systems. SiC and quartz were selected for the inner and outer layers of combustor walls, respectively. Numerical investigation demonstrates that the double-layered micro combustor can achieve a higher combustion efficiency at large inlet velocity than single-layered SiC and quartz micro combustors. It is revealed that the heat recirculation effect of double-layered micro combustor is greatly enhanced compared to quartz combustor; meanwhile, the heat loss rate is decreased to some extent compared to SiC combustor. Moreover, the negative stretch effect at flame tip is reduced in the double-layered combustor. Consequently, combustion process can be intensified and flame tip opening can be alleviated, leading to a higher combustion efficiency in the double-layered micro combustor.
引用
收藏
页码：39 / 47
页数：9
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