| 火灾烟雾颗粒532 nm光散射矩阵实验研究 |
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| 引用本文： | 张启兴,李耀东,邓小玖,张永明.火灾烟雾颗粒532 nm光散射矩阵实验研究[J].物理学报,2011,60(8):84216-084216. |
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| 作者姓名： | 张启兴 李耀东 邓小玖 张永明 |
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| 作者单位： | 1. 中国科学技术大学火灾科学国家重点实验室,合肥 230027;
2. 合肥工业大学电子科学与应用物理学院,合肥 230009 |
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| 基金项目： | 国家自然科学基金(批准号:50776084,51074147)和火灾科学国家重点实验室基金(批准号:HZ2009-KF08)资助的课题. |
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| 摘 要： | 基于自主研制的结合偏振调制和锁相检测技术的光散射实验装置,测量了两种典型火灾烟雾颗粒(棉绳阴燃烟雾和正庚烷池火烟雾)及超声雾化水滴颗粒的532 nm光散射矩阵元素随散射角的分布. 通过水滴颗粒测量结果与数值计算结果的比较验证了实验装置的可靠性. 对比分析了棉绳阴燃烟雾和正庚烷池火烟雾光散射矩阵元素随散射角的分布特征,讨论了该特征在颗粒区分上的应用. 研究了烟雾颗粒微观形貌特征对光散射矩阵的影响,发现可以利用Lorenz-Mie理论描述棉绳阴燃烟雾的光散射,表明其形貌为球形,并利用模拟退火拟合的方法得到了棉
关键词：
光散射
散射矩阵
烟雾
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| 关 键 词： | 光散射 散射矩阵 烟雾 |
| 收稿时间： | 2010-11-02 |
Experimental determination of scattering matrix of fire smoke particles at 532 nm |
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| Zhang Qi-Xing,Li Yao-Dong,Deng Xiao-Jiu and Zhang Yong-Ming.Experimental determination of scattering matrix of fire smoke particles at 532 nm[J].Acta Physica Sinica,2011,60(8):84216-084216. |
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| Authors: | Zhang Qi-Xing Li Yao-Dong Deng Xiao-Jiu and Zhang Yong-Ming |
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| Institution: | State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230027, China;College of Electronic Science and Applied Physics, Hefei University of Technology, Hefei 230009, China;College of Electronic Science and Applied Physics, Hefei University of Technology, Hefei 230009, China;State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230027, China |
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| Abstract: | Based on polarization modulation and lock-in detection,an experimental apparatus is built to determine several important angular dependent scattering matrix elements at 532 nm.The apparatus is tested by water droplets through comparing measurement results with Mie calculations.Measurement results of scattering matrix elements and element ratios between smoke particles produced by smoldering cotton test fire and those produced from flaming n-heptane test fire are presented.We find that results of Mie calcula... |
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| Keywords: | ligth scattering scattering matrix smoke |
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