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	微细直管燃烧器的散热损失研究
	李军伟 ; 钟北京 ; LI Jun-wei ; ZHONG Bei-jing
	2010-06-07 ; 2010-06-07
关键词	微小燃烧室 热损失 燃烧实验 甲烷 氧气 micro-combustor heat loss combustion test methane oxygen TK123
其他题名	Investigation on Heat Loss of Microtube Combustor
中文摘要	为了解微细直管燃烧器散热损失的大小,采用内径为0.6mm的微细陶瓷管进行氧气和甲烷气体的燃烧实验,测量了微细直管外壁面的温度,研究了氧气和甲烷的总流量和质量比对壁面散热的影响,以及不同总流量下直管壁面温度的动态变化过程。研究结果表明,混合比小于当量混合比时,随着混合比的增加,燃烧放热功率增加,壁面温度升高,管壁的散热功率增加:管壁的散热量占了很大一部分燃烧放热量,文中测量的管壁散热量最大为燃烧放热量的42%;在管壁散热量中,辐射散热量占很大一部分,最大达到总散热量的65%;随着总流量的增加,燃烧反应区的长度增加,轴向的壁面温差减小,壁面升温速率增大。; To understand heat loss characteristics of micro-combustor,combustion of CH_4/O_2 took place in a ceramic tube with inner diameter of 0.6mm,and temperature on the outer wall of the tube was measured.In the combustion tests, influence of total mass flow rate and mass ratio of O_2 and CH_4 on the heat loss of the tube wall was studied.The tests'results show that when mixture ratio is lower than the stoichiometric ratio,with the increase ofω(O_2)/ω(CH_4),combustion heat power increases.Therefore,wall temperature rises and heat loss power increases.The heat loss power occupies a very large proportion of the combustion power and the largest in the tests is 42%.However,in the wall heat loss,radiative heat loss accounts for a large part and the largest reaches 65% of the total heat loss.When the mass flow rate of O_2 and CH_4 is increased, combustion zone in the micro-tube is enlarged and temperature difference along the tube wall becomes smaller.Meanwhile,the combustion heat power and wall temperature variation rate increase.; 国家自然科学基金项目(50376027)~~
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/37594]
专题	清华大学
推荐引用方式 GB/T 7714	李军伟,钟北京,LI Jun-wei,等. 微细直管燃烧器的散热损失研究[J],2010, 2010.
APA	李军伟,钟北京,LI Jun-wei,&ZHONG Bei-jing.(2010).微细直管燃烧器的散热损失研究..
MLA	李军伟,et al."微细直管燃烧器的散热损失研究".(2010).

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