期刊
POWDER TECHNOLOGY
卷 382, 期 -, 页码 505-511出版社
ELSEVIER
DOI: 10.1016/j.powtec.2020.12.054
关键词
Interferometric particle imaging; Digital holography; Opaque particle; Size measurement; 2D location
资金
- Training Program of the Major Research Plan of the National Natural Science Foundation of China [91741129]
- Zhejiang Provincial Natural Science Foundation of China [LQ19E060010]
- Foundation of Science and Technology on Combustion and Explosion Laboratory [6142603180302]
- National Science and Technology Major Project [2017-V-0016-0069]
- Open Fund of Key Laboratory of Icing and Anti/De-icing [AIADL0180201]
Dual-beam interferometric particle imaging (DIPI) has been extended to measure the size and two-dimensional position of opaque spherical particles in a plane with dual-sheet illumination. A general DIPI model based on geometric optics has been established, and proof-of-concept experiments incorporating digital inline holography (DIH) have been performed for validation. The proposed interferogram processing algorithm shows good accuracy in locating particle position and size.
Dual-beam interferometric particle imaging (DIPI) has been proposed to measure opaque spherical particle size in the single-point region of interest. This work extends DIPI to measure the size and two-dimensional position of opaque spherical particle in a plane with dual-sheet illumination. A general DIPI model based on geometric optics is established to formulate the interference signal formation of DIPI by modeling the phase difference of two reflected light at far-field. Proof-of-concept experiments, incorporating digital inline holography (DIH), are performed for validation. An interferogram processing algorithm which adopts the sum-of-squared-difference image registration method and Fourier spectrum analysis has been proposed to locate the centroid of each out-of-focus pattern and extract the spatial frequency of fringes, and subsequently particle position and size. The average relative deviation values of DIPI in size measuring and two-dimensional locating are 2.4% and 1.9%, respectively, compared to those values by DIH, which demonstrates the practicability of DIPI in both respects. The extension of DIPI from point-probe to planar measurement promotes its applications to real scenarios, e.g., metal droplet in solid rocket propulsion. (C) 2020 Published by Elsevier B.V.
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