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Optical Engineering

High-resolution optical particle sizing in an optimized orientation
Author(s): HuiHe Qiu; W. Jia
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Paper Abstract

A novel optical technique has been developed to measure particle diameters in multiphase flows with high accuracy. This technique uses a photodiode array to measure the spatial frequency of the laser light scattering from a spherical particle located in the measurement volume. An optimized optical orientation angle is introduced by taking two scattering mechanisms into consideration, which provides high accuracy and avoids the measurement-volume effect in sizing large particles. The performance of the new method was simulated by using the generalized Lorenz-Mie theory (GLMT) and validated by experiments. The results show only 2% measurement uncertainty for particle sizes as large as 1200 ?m, which are commonly encountered in gas-solid and bubblywater multiphase flows. The feasibility of this technique was demonstrated experimentally.

Paper Details

Date Published: 1 December 1999
PDF: 10 pages
Opt. Eng. 38(12) doi: 10.1117/1.602318
Published in: Optical Engineering Volume 38, Issue 12
Show Author Affiliations
HuiHe Qiu, Hong Kong Univ of Science and Tech (Hong Kong)
W. Jia, Hong Kong Univ of Science and Technology (Hong Kong)

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