Meshed axisymmetric flame simulation and temperature reconstruction using light field camera

被引:9
作者
Li, Tianjia [1 ,2 ]
Gao, Peng [3 ,4 ]
Zhang, Chuanxin [5 ,6 ]
Yuan, Yuan [3 ,4 ]
Liu, Dong [1 ,2 ]
Shuai, Yong [3 ,4 ]
Tan, Heping [3 ]
机构
[1] Nanjing Univ Sci & Technol, Sch Energy & Power Engn, MIIT Key Lab Thermal Control Elect Equipment, Nanjing 210094, Peoples R China
[2] Nanjing Univ Sci & Technol, Sch Energy & Power Engn, Adv Combust Lab, Nanjing 210094, Peoples R China
[3] Harbin Inst Technol, Sch Energy Sci & Engn, 92 West Dazhi St, Harbin 150001, Peoples R China
[4] Harbin Inst Technol, Minist Ind & Informat Technol, Key Lab Aerosp Thermophys, 92 West Dazhi St, Harbin 150001, Peoples R China
[5] Fudan Univ, Dept Phys, State Key Lab Surface Phys, MOE, Shanghai 200438, Peoples R China
[6] Fudan Univ, Key Lab Micro & Nano Photon Struct, MOE, Shanghai 200438, Peoples R China
关键词
Radiative transfer; Axisymmetric flame; Flame temperature estimation; Light field imaging; VOLUME FRACTION FIELDS; 3-DIMENSIONAL TEMPERATURE; RADIATIVE PROPERTIES; SOOT TEMPERATURE; SURFACE REACTIVITY; DIFFUSION; DISTRIBUTIONS; TOMOGRAPHY; COMBUSTION; SCALE;
D O I
10.1016/j.optlaseng.2022.107159
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Axisymmetric flames are widely used in research on flame combustion mechanisms and mass and heat transfer because of their simple structure and applicability to complex reactions and transfer calculations. A new optical diagnostic method named light field camera has been validated as applicable for online detection of the tem-perature field of an axisymmetric flame. Reconstruction algorithms can be used to estimate the distribution of the flame temperature from the light field images and validated by setting a known distribution of temperature and radiative properties. In the present study, a model of meshed axisymmetric flame light field imaging was put forward. The complicated distribution of temperature and radiative properties were considered in the model after validation using two absorption coefficients arranged at different region. An axisymmetric laminar coflow diffusion ethylene flame was modeled to generate input data. Then, the Lucy-Richardson and nearest neighbor filtering deconvolution algorithms were applied to the refocused light field images for sectional reconstruction of the temperature field. Under the condition of high temperature and soot generated from ethylene flame, the obtained reconstructed temperature was comparable to the input temperature from 1400 K to 2000 K, within the detectable radiative intensity range of the light field camera.
引用
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页数:11
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