化工学报Issue(3)：1012-1017,6.DOI:10.3969/j.issn.0438-1157.2014.03.034
固体材料对微型钝体燃烧器吹熄极限的影响
Effects of solid material on blow-off limit in micro bluff body combustor
摘要
Abstract
In the present paper, the effect of solid material on the blow-off limit of a micro-combustor was numerically investigated. For the three solid materials selected, i.e., quartz, stainless steel, and SiC, the corresponding blow-off limits obtained for the three combustors are 36, 25 and 21 m·s-1. The underlying mechanisms are analyzed in terms of the interactions between heat transfer, flow field and flame stabilization. It is revealed that for small thermal conductivity (i.e., quartz), less heat is conducted to upstream walls, the fresh mixture is not sufficiently preheated, and the gas volume does not expand so significantly, leading to a larger“low velocity zone” and thus a higher blow-off limit. For the other two materials with higher thermal conductivities (i.e., stainless steel and SiC), higher thermal emissivity (i.e., SiC) results in higher “total heat loss ratio” and lower blow-off limit. It can be concluded that the solid material with a relatively low thermal conductivity and emissivity is beneficial to obtain higher blow-off limit for the micro bluff body combustor.关键词
微尺度/吹熄极限/固体材料/流场/传热/数值模拟Key words
microscale/blow-off limit/solid material/flow field/heat transfer/numerical simulation分类
化学化工引用本文复制引用
万建龙,范爱武,刘毅,皮博明,姚洪..固体材料对微型钝体燃烧器吹熄极限的影响[J].化工学报,2014,(3):1012-1017,6.基金项目
国家自然科学基金项目（51076054,51276073）；中央高校基本科研业务费专项资金项目（2013QN077）。@@@@supported by the National Natural Science Foundation of China (51076054，51276073) and the Fundamental Research Funds for the Central Universities (2013QN077) （51076054，51276073）
