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中国电机工程学报 2008, 28(14) 50-54 DOI:
ISSN: 0258-8013 CN: 11-2107/TM |
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| 工程热物理 |
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煤灰辐射特性的有效介质理论适用性分析 |
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殷金英 刘林华 |
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哈尔滨工业大学能源科学与工程学院 哈尔滨工业大学能源科学与工程学院 |
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摘要：
基于电磁场平均的概念，利用Maxwell-Garnett(MG)和Bruggeman有效介质理论分别对Goodwin人工合成灰渣、中国七台河矸石煤灰、俄罗斯褐煤灰Br-1 3组煤灰的光学常数进行计算，结果表明，人工合成灰渣光学常数的有效介质理论值与实验值吻合，而利用工业分析成分，燃烧生成煤灰光学常数的有效介质理论值与实验值有较大偏差。这是因为燃烧生成的煤灰实际组分不同于其相应的工业分析成分，致使煤灰的光学特性也不同于利用有效介质理论由工业分析成分计算得出的光学特性。利用工业分析成分，有效介质理论原则上不适用于燃烧生成的煤灰，但可用于人工合成的灰渣。 |
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关键词：
有效介质理论
有效光学常数
辐射特性
煤灰
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Analysis on Feasibility of Effective Medium Theory for Radiative Property of Coal Ash |
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YIN Jin-ying LIU Lin-hua |
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Abstract:
Based on the concept of averaging electromagnetic field, the optical constants of Goodwin synthetic ash, Chinese Qitaihe coal ash and Russian ash Br-1 were calculated by Maxwell-Garnett (MG) and Bruggeman effective medium theory (EMT). Computational results show that, for the synthetic coal slag, the optical constants estimated by EMT consist with the experimental values, but for the coal-ash produced in combustion, the optical constants estimated by EMT using industrial analytical species deviate far from the experimental values. This is because actual components of coal ash produced in combustion differ from its corresponding industrial analytical species, which leads the optical constant of coal ash produced in combustion deviates far from the value estimated by EMT using industrial analytical species. In principle, the effective medium theory based on industrial analytical species can not be applied to coal ash produced in combustion, but can be used to synthetic ash slag. |
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Keywords:
effective medium theory
effective optical constant
radiation property
coal ash
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收稿日期 2007-10-09 修回日期 1900-01-01 网络版发布日期 |
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DOI: |
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基金项目:
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通讯作者: 刘林华 |
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作者简介: |
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作者Email: lhliu@hit.edu.cn |
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| 参考文献： |
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| 本刊中的类似文章 |
| 1．殷金英 刘林华.多层结构半透明球形粒子的辐射特性[J]. 中国电机工程学报, 2009,29(17): 83-87 |
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| Copyright by 中国电机工程学报 |
