High-accuracy simultaneous measurement of particle size and location using interferometric out-of-focus imaging

Lü, Qieni; Kan, Han; Ge, Baozhen; Xiang, Wang

doi:10.1364/oe.24.016530

Cited by 23 publications

(4 citation statements)

References 20 publications

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“…The analysis of interferograms requires methods covering the case of interferograms of single particles to the more complex case of overlapping interferograms of closed particles. We see that the IPI technique can be used in an extreme environment where the wind speed can reach 70 m/s by following the same procedure as for IPI measurements in conventional environments [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. Thus, the IPI technique seems usable for carrying out airborne measurements.…”

Section: Discussionmentioning

confidence: 99%

Interferometric Ice Particle Imaging in a Wind Tunnel

Talbi

Duperrier

Delestre

et al. 2021

Optics

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We report interferometric ice particle imaging and sizing in an icing wind tunnel with wind speeds of 70 m/s. Single particle interferograms are first analysed, size measurements are performed, and examples of possible reconstructed shapes are deduced from the interferometric images. Particle sizing is also performed in the case of ice particles whose out-of-focus images overlap, with or without Moiré phenomena. Results show that the IPI technique can be carried out for irregular rough particles in a critical environment such as in an icing wind tunnel with high wind speeds.

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Section: Discussionmentioning

confidence: 99%

Interferometric Ice Particle Imaging in a Wind Tunnel

Talbi

Duperrier

Delestre

et al. 2021

Optics

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“…ILIDS was performed to measure the droplets diameter, similar to that done by Qieni et al. (2016), Bocanegra Evans et al. (2015) and Garcia-Magarino et al.…”

Section: Experimental Methodologymentioning

confidence: 99%

“…ILIDS was performed to measure the droplets diameter, similar to that done by Qieni et al (2016), Bocanegra Evans et al (2015 and Garcia-Magarino et al (2021). In ILIDS, the droplet diameter is measured by analysing the interference pattern of the reflected and first-order refracted rays scattered from spherical droplets that are illuminated by a laser.…”

Section: Interferometric Laser Imaging For Droplet Sizingmentioning

confidence: 99%

Separate and joint clustering characteristics of large-Stokes-number sprays subjected to turbulent co-flows

Rostami

Kheirkhah

2023

J. Fluid Mech.

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Separate and joint droplets, clusters, and voids characteristics of sprays injected in a turbulent co-flow are investigated experimentally. Simultaneous Mie scattering and interferometric laser imaging for droplet sizing along with separate hotwire anemometry are performed. The turbulent co-flow characteristics are adjusted using zero, one or two perforated plates. The Taylor-length-scale-based Reynolds number varies from 10 to 38, and the Stokes number estimated based on the Kolmogorov time scale varies from 3 to 25. The results show that the mean length scale of the clusters normalized by the Kolmogorov length scale varies linearly with the Stokes number. However, the mean void length scale is of the order of the integral length scale. It is shown that the number density of the droplets inside the clusters is approximately 7 times larger than that in the voids. The ratios of the droplets number densities in the clusters and voids to the total number density are independent of the test conditions and equal 5.5 and 0.8, respectively. The joint probability density function of the droplets diameter and clusters area shows that the droplets with the most probable diameter are found in the majority of the clusters. It is argued that intensifying the turbulence broadens the range of turbulent eddy size in the co-flow which allows for accommodating droplets with a broad range of diameters in the clusters. The results are of significance for engineering applications that aim to modify the clustering characteristics of large-Stokes-number droplets sprayed into turbulent co-flows.

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“…Maas [16] was one of the first to propose an automatic PTV algorithm. To track droplets, classical PTV algorithms perform two steps [17]: droplets are detected on each image, and the trajectories are reconstructed from the detected droplets. Even in more recent work, this structure is retained [18,19].…”

Section: Introductionmentioning

confidence: 99%

Adaptation of a PTV method for droplets evaporating in vicinity of a flame

et al. 2022

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HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

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High-accuracy simultaneous measurement of particle size and location using interferometric out-of-focus imaging

Cited by 23 publications

References 20 publications

Interferometric Ice Particle Imaging in a Wind Tunnel

Interferometric Ice Particle Imaging in a Wind Tunnel

Separate and joint clustering characteristics of large-Stokes-number sprays subjected to turbulent co-flows

Adaptation of a PTV method for droplets evaporating in vicinity of a flame

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