Estimation of 3D flame surface density and global fuel consumption rate from 2D PLIF images of turbulent premixed flame

Zhang, Meng; Wang, Jinhua; Jin, Wu; Huang, Zuohua; Kobayashi, Haruo; Ma, Lin

doi:10.1016/j.combustflame.2015.01.007

Cited by 52 publications

(15 citation statements)

References 46 publications

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“…Even with the latest advancement in high repetition rate lasers, high frame rate cameras, and the corresponding optics and electronics, measurements following the scanning approach have been limited to a temporal resolution of 1 kHz and a spatial resolution on the order of 1 mm in the direction of the scanning [14][15][16]. Higher spatiotemporal resolutions are desired or required for many flows of practical interest [18]. Another possible approach involved a combination of stereoscopic imaging [19,20] and PLIF.…”

Section: Introductionmentioning

confidence: 99%

Single-shot volumetric laser induced fluorescence (VLIF) measurements in turbulent flows seeded with iodine

Wu¹,

Xu²,

Lei³

et al. 2015

Opt. Express

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This work reports the experimental demonstration of single-shot visualization of turbulent flows in all three spatial dimensions (3D) based on volumetric laser induced fluorescence (VLIF). The measurements were performed based on the LIF signal of iodine (I 2 ) vapor seeded in the flow. In contrast to established planar LIF (PLIF) technique, the VLIF technique excited the seeded I 2 vapor volumetrically by a thick laser slab. The volumetric LIF signals emitted were then simultaneously collected by a total of five cameras from five different orientations, based on which a 3D tomographic reconstruction was performed to obtain the 3D distribution of the I 2 vapor in the target flow. Single-shot measurements (with a measurement duration of a few ns) were demonstrated in a 50 mm × 50 mm × 50 mm volume with a nominal spatial resolution of 0.42 mm and an actual resolution of ~0.71 mm in all three dimensions (corresponding to a total of 120 × 120 × 120 voxels). 249-256 (1996). 18. M. Zhang, J. Wang, W. Jin, Z. Huang, H. Kobayashi, and L. Ma, "Estimation of 3D flame surface density and global fuel consumption rate from 2D PLIF images of turbulent premixed flame," Combust.

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Section: Introductionmentioning

confidence: 99%

Single-shot volumetric laser induced fluorescence (VLIF) measurements in turbulent flows seeded with iodine

Wu¹,

Xu²,

Lei³

et al. 2015

Opt. Express

Self Cite

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“…They were of the view that the flame surface measurements were the more simple to perform and these should be used to check theoretical models. More recently, with similar mixtures and equivalence ratios,  , between 0.7 and 1.0, Meng Zhang et al [8] have also, found values of Io close to unity from estimated 3D flame surface density measurements.…”

Section: Introductionmentioning

confidence: 74%

Stretch rate effects and flame surface densities in premixed turbulent combustion up to 1.25 MPa

Bagdanavičius

Bowen

Bradley

et al. 2015

Combustion and Flame

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Key wordsTurbulent premixed flame, burning velocity, flame stretch rate, flame surface density, Markstein number. AbstractIndependent research at two centres using a burner and an explosion bomb has revealed important aspects of turbulent premixed flame structure. Measurements at pressures and temperatures up to 1.25 MPa and 673 K in the two rigs were aimed at quantifying the influences of flame stretch rate and strain rate Markstein number, Ma sr , on both turbulent burning velocity and flame surface density. That on burning velocity is expressed through the stretch rate factor, I o , or probability of burning, P b 0.5 . These depend on Ma sr , but they grow in importance as the Karlovitz stretch factor, K, increases, and are evaluated from the associated burning velocity data. Planar laser tomography was employed to identify contours of reaction progress variable in both rigs. These enabled both an appropriate flame front for the measurement of the turbulent burning velocity to be identified, and flame surface densities, with the associated factors, to be evaluated. In the explosion measurements, these parameters were derived also from the flame surface area, the derived P b 0.5 factor and the measured turbulent burning velocities. In the burner measurement they were calculated directly from the flame surface density, which was derived from the flame contours.A new overall correlation is derived for the P b 0.5 factor, in terms of Ma sr at different K and this is discussed in the light of previous theoretical studies. The wrinkled flame surface area normalised by the area associated with the turbulent burning velocity measurement, and the ratio of turbulent to laminar burning velocity, u t /u l , are also evaluated. The higher the value of , the more effective is an increased flame wrinkling in increasing u t /u l . A correlation of the product of k and the laminar flame thickness with Karlovitz stretch factor and Markstein number is explored using the present data and those of other workers. Some generality is revealed, enabling the wave length associated with the spatial change in mean reaction progress variable to be expressed by the number of laminar flame thicknesses, and the flame volume to be found.

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“…However, measurement of curvature is difficult, and past efforts have been primarily limited to measurement of 2D curvature or the estimation of 3D curvature at a point of along a line. Measurement of 2D curvature is relatively straightforward with planar imaging techniques [44] , for example, employing a crossed-plane configuration [45] ; the 2D curvatures measured in these planes then can be used to estimate the 3D curvature along the intersection. This section reports the measurements of full-field 3D curvature, based on the 3D reconstructions obtained in this work.…”

Section: D Curvature Resultsmentioning

confidence: 99%

3D flame topography and curvature measurements at 5 kHz on a premixed turbulent Bunsen flame

Lei

et al. 2016

Combustion and Flame

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a b s t r a c tThis work reports the measurements of three-dimensional (3D) flame topography and curvature of a premixed turbulent Bunsen flame at a rate of 5 kHz, using a technique combining chemiluminescence and tomography. Line-of-sight images of chemiluminescence (termed projections ) of the target flame were recorded by six cameras from different orientations simultaneously at 5 kHz. Based on these projections, a tomography algorithm reconstructed the 3D flame structure, based on which 3D curvature was then calculated. Due to the 3D nature of the data, statistics of flame properties can then be extracted both in temporal and spatial domains. Probability density function (PDF) of flame topography was extracted from a series of 3D measurements, and the PDFs of the flame at different spatial locations were examined. Furthermore, the instantaneously measured 3D flame topography also enabled the calculation of 3D flame curvature (or 2D curvature along an arbitrary orientation). The PDFs of curvature in 2D and 3D were then extracted and compared. These results provide quantification of the flame surface shape in 3D (cylindrical, elliptic, or hyperbolic), illustrating the utility of 3D diagnostics to fully resolve the dynamics of turbulent flames.

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Estimation of 3D flame surface density and global fuel consumption rate from 2D PLIF images of turbulent premixed flame

Cited by 52 publications

References 46 publications

Single-shot volumetric laser induced fluorescence (VLIF) measurements in turbulent flows seeded with iodine

Single-shot volumetric laser induced fluorescence (VLIF) measurements in turbulent flows seeded with iodine

Stretch rate effects and flame surface densities in premixed turbulent combustion up to 1.25 MPa

3D flame topography and curvature measurements at 5 kHz on a premixed turbulent Bunsen flame

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