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

Yue Wu, Wenjiang Xu, Qingchun Lei, Lin Ma

Research output: Contribution to journalArticlepeer-review

43 Scopus citations

Abstract

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 (I2) vapor seeded in the flow. In contrast to established planar LIF (PLIF) technique, the VLIF technique excited the seeded I2 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 I2 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).

Original languageEnglish (US)
Pages (from-to)33408-33418
Number of pages11
JournalOptics Express
Volume23
Issue number26
DOIs
StatePublished - Dec 28 2015

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Publisher Copyright:
© 2015 Optical Society of America.

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