Spatial resolution of light field sectioning pyrometry for flame temperature measurement

Liu, Yudong; Zhu, Mingjuan; Wang, Tianxiang; Lu, Gang; Hossain, Md. Moinul; Zhang, Biao; Li, Jian; Xu, Chuanlong

doi:10.1016/j.optlaseng.2021.106545

Cited by 16 publications

(3 citation statements)

References 42 publications

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“…The air is injected through annular nozzles made of glass beads and meshes. The injected air not only provides the oxidizer but also protects the flame from surrounding disturbance [45]. The experiments were carried out in a dark room to avoid stray radiation.…”

Section: Resultsmentioning

confidence: 99%

Optimum angular arrangement of a multi-light field imaging technique for flame temperature reconstruction

Hossain

Lu³

et al. 2022

Measurement

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Section: Resultsmentioning

confidence: 99%

Optimum angular arrangement of a multi-light field imaging technique for flame temperature reconstruction

Hossain

Lu³

et al. 2022

Measurement

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“…The particle motions are captured using an in-house LF camera with the optical settings listed in Table 4. A detailed description of the camera assembly can be found elsewhere in [33,60].…”

Section: Experiments On a Confined Cylinder Wake Flow 41 Physical Imp...mentioning

confidence: 99%

Approach to select optimal cross-correlation parameters for light field particle image velocimetry

Zhu

Hossain

et al. 2022

Physics of Fluids

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The light field particle image velocimetry (LF-PIV) has shown a great potential for three-dimensional (3D) flow measurement in space-constrained applications. Usually, the parameters of the cross-correlation calculation in the LF-PIV are chosen based on empirical analysis or introduced from conventional planar PIV, which lowers the accuracy of 3D velocity field measurement. This study presents an approach to selecting optimal parameters of the cross-correlation calculation and thereby offers systematic guidelines for experiments. The selection criterion of the interrogation volume size is studied based on the analysis of the valid detection probability of the correlation peak. The optimal seeding concentration and the size of tracer particles are then explored through synthetic Gaussian vortex field reconstruction. The optimized parameters are employed in a cylinder wake flow measurement in a confined channel. A comparative study is conducted between the LF-PIV and a planar PIV system. Results indicate that the LF-PIV along with the optimized parameters can measure the 3D flow velocity of the cylinder wakes accurately. It has been observed that the mean and max errors of velocity decrease by 32.6% and 18.8%, respectively compared to the related LF-PIV techniques without consideration of optimal parameters. Therefore, it is suggested that the optimized cross-correlation parameters in the LF-PIV can improve the accuracy of 3D flow measurement.

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“…In radiation-based diagnostic techniques, an optical field camera can capture the temperature of particles and the velocity of the fluid during combustion from multiple angles in a single shot [7,8], which helps to study the distribution of parameters inside the fluid medium and reveal the real combustion, heat, and mass transfer principles of the fluid [9,10]. Qi et al combined the wave optics theory with the transport process of radiation in a semi-transparent medium to propose the light-field imaging model for emitting absorbing media [8].…”

Section: Introductionmentioning

confidence: 99%

Simultaneously reconstructing gas and carbon soot properties using multispectral light field images

Chen,

Li,

Dong

et al. 2024

International Academic Conference on Optics and Photonics (IACOP 2023)

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Real-time diagnosis of the radiative properties of participatory media, such as flames, is very difficult due to their spatial and temporal complexity. In this paper, we propose a new method to simultaneously reconstruct gas and carbon soot properties using a multispectral light-field camera. Hyperspectral light-field imaging is performed on two targets (a rectangular participating medium and a flame) to analyze the spectral imaging effect of gas-solid radiative properties in the mid-infrared band. The two-color method combined with the nearest-neighbor filtering method was used to reconstruct the medium temperature and carbon soot absorption coefficients, which helps yield the gas mole fractions (H 2 O and CO 2 ) for a specific mid-infrared band and reconstruct their actual distributions.

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Spatial resolution of light field sectioning pyrometry for flame temperature measurement

Cited by 16 publications

References 42 publications

Optimum angular arrangement of a multi-light field imaging technique for flame temperature reconstruction

Optimum angular arrangement of a multi-light field imaging technique for flame temperature reconstruction

Approach to select optimal cross-correlation parameters for light field particle image velocimetry

Simultaneously reconstructing gas and carbon soot properties using multispectral light field images

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