| 喷管内传递特性对微尺度扩散火焰的影响 |
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| 引用本文： | 何琼,赵黛青,汪小憨,蒋利桥,杨卫斌.喷管内传递特性对微尺度扩散火焰的影响[J].燃烧科学与技术,2009,15(3). |
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| 作者姓名： | 何琼 赵黛青 汪小憨 蒋利桥 杨卫斌 |
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| 作者单位： | 1. 中国科学院广州能源研究所,广州,510640;中国科学院研究生院,北京,100049
2. 中国科学院广州能源研究所,广州,510640 |
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| 基金项目： | 国家自然科学基金，广东省自然科学基金 |
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| 摘 要： | 对均匀空气流中微尺度甲烷扩散燃烧进行了数值模拟,重点考察微喷管内的流动和传热传质对微尺度燃烧特性的影响.结果表明,在低流速下,内径为0.3 mm的微喷管内进气速度为1.0 m/s时燃料与空气的混合已经发生,混合气被管外的热量预热,同时火焰的热损失增加.在喷管直径一定时,减小燃料喷出速度,传热传质现象对微尺度甲烷扩散火焰特性的影响增强;当进气速度为0.5 m/s时,甲烷在微喷管内开始燃烧,放出热量.在进行微尺度解析计算时,必须包含一定的喷管区域.
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| 关 键 词： | 微尺度燃烧 扩散火焰 分子扩散 对流 |
Influence of Heat and Mass Transfer in Nozzle on Methane Micro-Diffusion Flames |
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| HE Qiong,ZHAO Dai-qing,WANG Xiao-han,JIANG Li-qiao,YANG Wei-bin.Influence of Heat and Mass Transfer in Nozzle on Methane Micro-Diffusion Flames[J].Journal of Combustion Science and Technology,2009,15(3). |
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| Authors: | HE Qiong ZHAO Dai-qing WANG Xiao-han JIANG Li-qiao YANG Wei-bin |
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| Affiliation: | 1.Guangzhou Institute of Energy Conversion of Chinese Academy of Sciences;Guangzhou 510640;China;2.Graduate School of the Chinese Academy of Sciences;Beijing 100049;China |
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| Abstract: | The methane micro diffusion flames in micro nozzle in air are investigated numerically,with the focus on the influence of heat and mass transfer in the nozzle on the characteristics of the flames.The results show that at low flow velocity, the mixing process of fuel and air takes place in the nozzle whose inner diameter is 0.3 mm and where the fuel velocity is 1.0 m/s,the mixture is preheated by the flame,and the heat loss of the flame increases.In a nozzle with the same inner diameter,when the fuel inlet v... |
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| Keywords: | micro-combustion diffusion flame molecular diffusion convection |
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