| 煤粉气流中钝体稳焰机理的近似分析 |
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| 引用本文： | 陈维汉,钱壬章. 煤粉气流中钝体稳焰机理的近似分析[J]. 华中科技大学学报(自然科学版), 1993, 0(Z1) |
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| 作者姓名： | 陈维汉 钱壬章 |
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| 作者单位： | 华中理工大学动力工程系(陈维汉)，华中理工大学动力工程系(钱壬章) |
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| 基金项目： | 国家自然科学基金资助项目. |
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| 摘 要： | 基于煤粉气流中钝体后回流区的流场特性,假定回流区为一温度均匀的搅拌系统,在其中只有煤粉挥发分的析出并燃烧,而燃烧过程受挥发分析出规律的控制,从而导出了煤粉气流火焰稳定的定量分析模型.以回流区温度不变作为火焰稳定条件可进而得到使煤粉气流火焰稳定的最小回流区长度的表达式.
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| 关 键 词： | 钝体 回流区 煤粉气流 火焰稳定模型 |
A Proximate Analysis on the Mechanism of Flame Stabilization by the Bluff-Body in the Pulverized-Coal-Airstream |
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| Chen Weihan Qian Renzhang. A Proximate Analysis on the Mechanism of Flame Stabilization by the Bluff-Body in the Pulverized-Coal-Airstream[J]. JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE, 1993, 0(Z1) |
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| Authors: | Chen Weihan Qian Renzhang |
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| Affiliation: | Chen Weihan Qian Renzhang |
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| Abstract: | The characteristics of the recirculating zone formed behind a bluff-body or a slit bluff-body in the pulverized-coal-airstream is analyzed and a quantitative model equation is derived for the first time to explain the flame stabilization of the airstream on the assumption that the recirculating zone is regarded as a lumped system and the combustion of the volatile emitted from the pulverized coal is controlled by the rate of volatile emission. A criterion expression for the minimum length of the recirculating zone for the stable combustion of the pulverized-coal-airstream is also derived from the model equation based on the constant recirculating zone temperature. |
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| Keywords: | bluff-body recirculating zone pulverized-coal-airstream flame stabilization model |
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