Study on the detection of three-dimensional soot temperature and volume fraction fields of a laminar flame by multispectral imaging system

被引：41

作者：

Ni, Mingjiang ^{[1
]}

Zhang, Haidan ^{[1
]}

Wang, Fei ^{[1
]}

Xie, Zhengchao ^{[1
]}

Huang, Qunxing ^{[1
]}

Yan, Jianhua ^{[1
]}

Cen, Kefa ^{[1
]}

机构：

[1] Zhejiang Univ, State Key Lab Clean Energy Utilizat, Hangzhou 310027, Peoples R China

来源：

APPLIED THERMAL ENGINEERING | 2016年 / 96卷

基金：

国家高技术研究发展计划(863计划);

关键词：

Flame reconstruction; Soot temperature; Soot volume fraction; LCTF; Multispectral images; LASER-INDUCED INCANDESCENCE; VISUALIZATION;

D O I：

10.1016/j.applthermaleng.2015.11.116

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Charge-coupled device (CCD) cameras with liquid crystal tunable filters (LCTF) were introduced to capture the multispectral flame images for obtaining the line-of-sight radiation intensities. A least square QR decomposition method was applied to solve the reconstruction matrix equation and obtain the multi wavelength local emission distributions from which temperature and volume fraction profiles can be retrieved. Compared with the original two-color method, the use of a wide range of spectral data was proved to be capable of reducing the reconstruction error. Reconstruction results of the two methods with different signal to noise ratio (SNR) were discussed. The effect of selected wavelength number is analyzed and the best number is determined to be in the range of 6-11. The proposed multispectral imaging system was verified to be feasible for the reconstruction of temperature and soot volume fraction distributions according to the experimental measurement results. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：421 / 431

页数：11

共 22 条

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