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旋流火焰燃烧温度场二维吸收光谱诊断
引用本文:林鑫,李飞,王宽亮,余西龙. 旋流火焰燃烧温度场二维吸收光谱诊断[J]. 气体物理, 2019, 4(2): 55-61. DOI: 10.19527/j.cnki.2096-1642.0748
作者姓名:林鑫  李飞  王宽亮  余西龙
作者单位:1.中国科学院力学研究所高温气体动力学国家重点实验室,北京 100190
基金项目:国家自然科学基金11802315
摘    要:针对旋流火焰的复杂流场结构,结合可调谐二极管吸收光谱技术(tunable diode laser absorption spectroscopy , TDLAS)和多光谱层析成像术(hyperspectral tomography , HT),发展了具有空间分辨能力的二维吸收光谱测量技术(tunable diode laser absorption tomography , TDLAT),实现了甲烷/空气旋流火焰不同高度的二维温度场测量.该TDLAT系统吸收波长为7 185.6 , 7 444.3 , 6 807.8和7 466.3 cm -1 四线,采用分时-直接吸收探测策略,测量频率2.5 kHz ,采用13×13路正交光路(空间分辨率7 mm),采用模拟退火算法进行数据重建.经与理论计算结果对比分析,重建结果真实地反映了旋流火焰温度场的二维分布.

关 键 词:旋流火焰  可调谐二极管吸收光谱技术  多光谱层析成像术  二维重建  模拟退火算法
收稿时间:2019-01-05

Diode Laser Absorption Tomography for Swirling Flame Diagnostics
LIN Xin,LI Fei,WANG Kuan-liang,YU Xi-long. Diode Laser Absorption Tomography for Swirling Flame Diagnostics[J]. Physics of Gases, 2019, 4(2): 55-61. DOI: 10.19527/j.cnki.2096-1642.0748
Authors:LIN Xin  LI Fei  WANG Kuan-liang  YU Xi-long
Affiliation:1.State Key Laboratory of High Temperature Gas Dynamics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China2.School of Engineering Science, University of Chinese Academy of Sciences, Beijing 100049, China
Abstract:The swirl burner plays an important role in the aero-engine combustor. Accurate diagnosis of the heat release rate distribution is helpful for studying thermos-acoustic instabilities, flame shape transition and turbulence-chemistry interactions in the swirl flames. Tunable diode laser absorption spectroscopy (TDLAS) is a powerful tool with which to probe atoms and molecules non-intrusively and has been used in combustion diagnostics. Combined with hyperspectroscopy tomography (HT), TDLAS can improve its spatial resolution. The diagnostics system was composed of 26 beams (13×13, 13 parallel beams and 13 vertical beams). Four water vapor absorption lines, 7 185.6, 7 444.3, 6 807.8, 7 466.3 cm-1, were utilized in each beam using time-division-multiplexed method at total measuring frequency of 2.5 kHz. A reconstruction routine based on simulated-annealing algorithm was used to reconstruct the two-dimensional distribution of temperature and H2O concentration. Comparisons with CFD simulations show that the reconstruction results reflect the real two-dimensional distribution of temperature in the swirl flame. 
Keywords:swirl flame  tunable diode laser absorption spectroscopy (TDLAS)  hyperspectral tomography (HT)  two-dimensional reconstruction  simulated-annealing algorithm
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