Influence analysis of radiative properties and flame temperature reconstruction based on optical tomography

Yuan, Yuan; Li, Tianjiao; Zhu, Yanlong; Tan, He‐Ping

doi:10.1016/j.ijheatmasstransfer.2018.06.008

Cited by 13 publications

(4 citation statements)

References 30 publications

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“…sc s is the covariance. c 1 and c 2 are regularization parameters, and are calculated by equation (15). Where L is the dynamic range of the pixel value, which generally equals to 255. k 1 is 0.01 and k 2 is 0.03.…”

Section: D Rapid Flame Chemiluminescence Tomographymentioning

confidence: 99%

“…To quantitatively evaluate the accuracy of the training results of the ResNet Model, RMSE is used in the numerical simulations as defined in equation (15).…”

Section: Numerical Simulationmentioning

confidence: 99%

“…However, the radiance sampling in the spatial dimensions from light field camera is restricted [14]. The lower spatial resolution will lead to a lower accuracy of reconstructed 3D parameters of flame [15]. Furthermore, the high price of optical field camera and complex multiple views projection calculation, result in operating the system costly and time-consuming.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A camera array based reconstruction method for limited observation windows projection in three-dimensional flame chemiluminescence tomography

Rong¹,

Yang²,

Ran³

et al. 2022

Eng. Res. Express

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Three-dimensional(3D) flame chemiluminescence tomography (FCT) is realized in multi-direction and multi-angle using traditional iterative algorithms. However, 3D-FCT is often challenged by insufficient sampling data because of the limited observation windows provided in practical for flame measurement. To obtain flame multiple projections in limited observation windows, we develop a camera array arrangement in FCT. In addition, a residual network with a new loss function combing physical model of flame is proposed to achieve higher reconstruction accuracy, faster reconstruction speed and efficient image feature in residual network for 3D FCT measurement. Furthermore, the determination of the weight coefficient in the loss function is performed by numerical simulation experiments. The flame reconstruction results show that the proposed residual network method including the new loss function has more reliable structural similarity and noise immunity compared with the ART algorithm and the CNN algorithm. This work provides a faster and more accurate method for combustion diagnosis under limited observation windows with insufficient projections.

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Section: D Rapid Flame Chemiluminescence Tomographymentioning

confidence: 99%

“…To quantitatively evaluate the accuracy of the training results of the ResNet Model, RMSE is used in the numerical simulations as defined in equation (15).…”

Section: Numerical Simulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A camera array based reconstruction method for limited observation windows projection in three-dimensional flame chemiluminescence tomography

Rong¹,

Yang²,

Ran³

et al. 2022

Eng. Res. Express

View full text Add to dashboard Cite

show abstract

“…And it may affect the accuracy of temperature measurement. On that basis, Zhou et al [26], [27] give a method for determining the properties of a medium by using spectral analysis, but it was not applicable to all types of flame.…”

Section: Introductionmentioning

confidence: 99%

Two-Dimensional Flame Temperature and Emissivity Distribution Measurement Based on Element Doping and Energy Spectrum Analysis

et al. 2020

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Most of the existing non-contact flame temperature measurement methods rely on the ideal thermal-optical excitation model, which has a great influence on temperature measurement accuracy. Therefore, based on element doping and energy spectrum analysis, this study proposes a novel twodimensional (2-D) estimation method for flame temperature and emissivity distribution. The element doping method and laser-induced breakdown spectroscopy (LIBS) are introduced into the temperature field test. The external doped element whose spectral radiation characteristics are easy to be analyzed, is regarded as the measured particles to describe the flame temperature distribution from the side. And LIBS is used to analyze and select the doped element, and further determine the effective working wavelength of the optical camera. Besides, the relationship between spectral radiance and emissivity (L -ε) of doped samples is obtained by the emissivity calibration experiment. Then, the 2-D temperature and emissivity distributions can be estimated. Infrared thermograph is used to verify the accuracy of temperature measurement, the measurement error between calculated and standard values is not more than 5%. The experimental results of the oxygen-ethanol combustion flame show that this method can be well applied to the similar temperature measurement.INDEX TERMS Temperature measurement, Spectral emissivity, Element doping, Spectral analysis.

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Joint method for reconstructing three-dimensional temperature of flame using Lucy-Richardson and nearest neighbor filtering using light-field imaging

Yuan

Shuai

et al. 2019

Sci. China Technol. Sci.

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Influence analysis of radiative properties and flame temperature reconstruction based on optical tomography

Cited by 13 publications

References 30 publications

A camera array based reconstruction method for limited observation windows projection in three-dimensional flame chemiluminescence tomography

A camera array based reconstruction method for limited observation windows projection in three-dimensional flame chemiluminescence tomography

Two-Dimensional Flame Temperature and Emissivity Distribution Measurement Based on Element Doping and Energy Spectrum Analysis

Joint method for reconstructing three-dimensional temperature of flame using Lucy-Richardson and nearest neighbor filtering using light-field imaging

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