光学学报, 2008, 28 (12): 2330, 网络出版: 2008-12-17  

叠栅偏折层析测量火焰温度和密度分布

Temperature and Density Distribution Measurement of Flame by Using Moiré Deflection Tomography
作者单位
南京理工大学信息物理与工程系, 江苏 南京 210094
摘要
提出将带滤波的叠栅偏折层析系统用于存在化学反应的多组分复杂气体流场的诊断。以丙烷的燃烧火焰为例, 实验提取出叠栅条纹的偏移量并转换为偏折角, 然后基于偏折层析的滤波反投影算法重建出场的折射率分布, 给出了两种不同情况下给定截面的三维温度和密度分布。对比发现, 对存在化学反应的多组分火焰流场不能基于假设研究对象是空气流场, 而必须对火焰流场本身发生的化学反应及生成物进行考虑, 混合流场的等效G-D常量和分子量必须根据不同场的具体组分情况进行修正。
Abstract
The filtered moiré deflection tomography is proposed to diagnose multi-component complex flow fields which contain chemical reactions. As an example, the combustion of propane is chosen as the measured field. The offset of moiré fringe is refined and transformed to deflection angle. The refractive-index distribution of field is reconstructed by deflection filtered back projection (DFBP), and the three-dimensional temperature and density distributions of a certain cross section at two different situations are given. By contrast, multi-component complex flow fields should not regard air as the studied object, chemical reaction and resultant of flow field must be considered , and the equivalent G-D constant and molecular weight of mixed flow field must be amended, according to specific conditions of the measured objects.
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陈云云, 宋旸, 贺安之, 李振华. 叠栅偏折层析测量火焰温度和密度分布[J]. 光学学报, 2008, 28(12): 2330. Chen Yunyun, Song Yang, He Anzhi, Li Zhenhua. Temperature and Density Distribution Measurement of Flame by Using Moiré Deflection Tomography[J]. Acta Optica Sinica, 2008, 28(12): 2330.

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