Correction to: Development and Validation of Evaluation Methods for 3D Flame Propagation Speed of Turbulent Non‑premixed Edge Flames via Tomographic Chemiluminescence

Chi, Yeqing; Lei, Qingchun; Song, Erzhuang; Fan, Wei; Yu, Sha

doi:10.1007/s10494-021-00294-7

Cited by 2 publications

(2 citation statements)

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“…By implementing these methods, 3D curvatures were calculated and discussed in some studies to reveal interesting correlations with the ow or ame essence. For example, Chi et al nds that the response of 3D ame propagation speed to the 3D mean curvature is positively correlated (Chi et al, 2021). Enlighted by past efforts, this work investigates the 3D curvature distribution on the surface of reconstructed two-phase jet ow, aiming at nding quantitative relationship with the ow dynamics, represented by the surface velocity.…”

Section: Surface Curvature and Velocity Measurementsmentioning

confidence: 99%

“…The average and the product of two principal curvatures are called mean curvature (K Mean ) and Gaussian curvature (K Gauss ), respectively. Both K Mean and K Gauss can be only obtained by 3D measurements, and are usually used to describe the instantaneous surface shape and forecast the ow development (Chi et al, 2021). The process of K Mean and K Gauss calculation is divided into 4 steps.…”

Section: D Curvatures On Two-phase Ow Surfacementioning

confidence: 99%

See 1 more Smart Citation

3D Measurements of a Two-Phase Flow Inside an Optical Cylinder Based on Full-Field Cross-Interface Computed Tomography

Ling

Chen

et al. 2023

Flow Turbulence Combust

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Three-dimensional (3D) tomographic reconstruction in con ned-space requires a mapping relationship which considers the refraction distortion caused by optical walls. In this work, a tomography method, namely full-eld cross-interface computed tomography (FCICT), is proposed to solve con ne-space problems. The FCICT method utilizes Snell's law and reverse ray-tracing to analytically correct imaging distortion and establishes the mapping relationship from 3D measurement domain to 2D images. Numerical phantom study is rst employed to validate the FCICT method. Afterwards, the FCICT is applied on the experimental reconstruction of an illuminated two-phase jet ow which is initially generated inside an optical cylinder and then gradually moves outside. The comparison between accurately reconstructed vapor by FCICT and coarse result by traditional open space tomography algorithm provides a practical validation of FCICT. Based on the 3D vapor reconstructions at different time sequences, the distributions of surface velocity and 3D curvatures are calculated, and their correspondences are systematically analyzed. It is found that the velocity of a surface point is positively correlated with the mean curvature at the same point, which indicates the concavity/convexity of vapor surface is possibly in accordance with the surface velocity. Moreover, the surface velocity presents monotonical increasing trend with larger Gaussian curvature for elliptic surface points only, due to the dominated Brownian motion as the vapor develops.

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Section: Surface Curvature and Velocity Measurementsmentioning

confidence: 99%

Section: D Curvatures On Two-phase Ow Surfacementioning

confidence: 99%

3D Measurements of a Two-Phase Flow Inside an Optical Cylinder Based on Full-Field Cross-Interface Computed Tomography

Ling

Chen

et al. 2023

Flow Turbulence Combust

View full text Add to dashboard Cite

show abstract

3D Measurements of a Two-phase Flow inside an Optical Cylinder Based on Full-Field Cross-Interface Computed Tomography

Ling

Chen

Gao

et al. 2022

Preprint

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Three-dimensional (3D) tomographic reconstruction in confined-space requires a mapping relationship which considers the refraction distortion caused by optical walls. In this work, a tomography method, namely full-field cross-interface computed tomography (FCICT), is proposed to solve confine-space problems. The FCICT method utilizes Snell’s law and reverse ray-tracing to analytically correct imaging distortion and establishes the mapping relationship from 3D measurement domain to 2D images. Numerical phantom study is first employed to validate the FCICT method. Afterwards, the FCICT is applied on the experimental reconstruction of an illuminated two-phase jet flow which is initially generated inside an optical cylinder and then gradually moves outside. The comparison between accurately reconstructed vapor by FCICT and coarse result by traditional open space tomography algorithm provides a practical validation of FCICT. Based on the 3D vapor reconstructions at different time sequences, the distributions of surface velocity and 3D curvatures are calculated, and their correspondences are systematically analyzed. It is found that the velocity of a surface point is positively correlated with the mean curvature at the same point, which indicates the concavity/convexity of vapor surface is possibly in accordance with the surface velocity. Moreover, the surface velocity presents monotonical increasing trend with larger Gaussian curvature for elliptic surface points only, due to the dominated Brownian motion as the vapor develops.

show abstract

Correction to: Development and Validation of Evaluation Methods for 3D Flame Propagation Speed of Turbulent Non‑premixed Edge Flames via Tomographic Chemiluminescence

Cited by 2 publications

References 0 publications

3D Measurements of a Two-Phase Flow Inside an Optical Cylinder Based on Full-Field Cross-Interface Computed Tomography

3D Measurements of a Two-Phase Flow Inside an Optical Cylinder Based on Full-Field Cross-Interface Computed Tomography

3D Measurements of a Two-phase Flow inside an Optical Cylinder Based on Full-Field Cross-Interface Computed Tomography

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