Mixing ratio measurement in multiple sprays with global rainbow refractometry

Wu, Yingchun; Li, Can; Cao, Jian-zheng; Wu, Xuecheng; Saengkaew, Sawitree; Gao, Xiang; Gréhan, Gérard; Cen, Kefa

doi:10.1016/j.expthermflusci.2018.06.004

Cited by 14 publications

(1 citation statement)

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“…Van Beeck and his colleagues also studied the inversion algorithm of GRT [13] [14]. GRT can be used to measure the mixing ratio of liquid-liquid suspension systems, droplets in large containment vessels, and multiphase flow [14] [15] [16]. In order to have a higher spatial resolution, Gaussian beams are used as a light source.…”

Section: Introductionmentioning

confidence: 99%

Droplet Characterization Based on the Simulated Secondary Rainbows

Wang¹,

Wang²,

Zhang³

2021

OPJ

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The droplet size, size distribution, refractive index, and temperature can be measured simultaneously by the rainbow technique. In the present work, the rainbow scattering diagram for a spherical droplet in the secondary rainbow region is simulated by the use of the generalized Lorenz-Mie theory. For achieving high spatial resolution in denser droplet sprays, a focused Gaussian beam is used. For droplet characterization, different inversion algorithms are investigated, which includes trough-trough (θ min1 and θ min2 ) method and inflection-inflection (θ inf1 and θ inf2 ) method. For the trough-trough algorithm, the absolute error of the refractive index is between −6.4 × 10 −4 and 1.7 × 10 −4 , and the error of the droplet radius is only between −0.55% and 1.77%. For the inflection-inflection algorithm, the maximum absolute error of the inverted refractive index is less than −1.1 × 10 −3 . The error of the droplet radius is between −0.75% and 5.67%.

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Section: Introductionmentioning

confidence: 99%