| 基于分子运动对流换热和热辐射下煤粉颗粒群粒子的加热分析 |
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| 引用本文： | 刘国军,孙丹萍,周怀春.基于分子运动对流换热和热辐射下煤粉颗粒群粒子的加热分析[J].工程热物理学报,2005,26(4):717-719. |
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| 作者姓名： | 刘国军 孙丹萍 周怀春 |
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| 作者单位： | 华中科技大学煤燃烧国家重点实验室,武汉,430074;华中科技大学煤燃烧国家重点实验室,武汉,430074;华中科技大学煤燃烧国家重点实验室,武汉,430074 |
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| 基金项目： | 教育部优秀青年教师资助计划 |
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| 摘 要： | 本文建立了在烟气对流加热和辐射状态下的煤粉颗粒群加热模型,通过数值模拟,模拟研究了不同锅炉炉膛尺寸下不同煤粉粒子粒径的煤粉群粒子加热时间以及粒子温升的关系,对对流换热和辐射换热在着火热源中所占比重进行了分析,模型很好的模拟了粒子的升温,能够较好的反映出煤粉粒子加热升温机理,为煤粉射流微元加热及着火提供了计算方法。
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| 关 键 词： | 煤粉颗粒群 适应系数 对流 辐射 |
| 文章编号： | 0253-231X(2005)04-0717-03 |
| 修稿时间： | 2004年12月24 |
THE HEATING UP ANALYSIS OF PULVERIZED-COAL CLOUD PARTICLE HEATED BY THE MOLECULAR MOTION CONVECTION AND HEAT RADIATION |
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| LIU Guo-jun,SUN Dan-Ping,ZHOU Huai-chun.THE HEATING UP ANALYSIS OF PULVERIZED-COAL CLOUD PARTICLE HEATED BY THE MOLECULAR MOTION CONVECTION AND HEAT RADIATION[J].Journal of Engineering Thermophysics,2005,26(4):717-719. |
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| Authors: | LIU Guo-jun SUN Dan-Ping ZHOU Huai-chun |
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| Abstract: | This paper presents an model on heating up analysis of pulverized-coal cloud heated by smoke convection and radiation. Correlations of particle heating time with particle temperature are predicated by numerical modeling of all kinds diameters of pulverized-coal cloud particles under all kinds of boiler furnaces. Then analyzed proportion of convection heating and heat radiation in combustion heat source. The simulation of particle temperature change under the modle reflected mechanism of temperature change during heating coal powder particles, which provides a calculating method for coal powder efflux micro-element heating and firing. |
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| Keywords: | pulverized-coal cloud adapt coefficient convection radiation |
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