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International Journal of Fluid Mechanics Research
ESCI SJR: 0.206 SNIP: 0.446 CiteScore™: 0.9

ISSN Imprimir: 2152-5102
ISSN On-line: 2152-5110

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International Journal of Fluid Mechanics Research

DOI: 10.1615/InterJFluidMechRes.v24.i4-6.410
pages 861-871

Effects of Light-Absorbing Droplets and Optical Factors on a Phase Doppler Particle Size Analyzer

Jy-Cheng Chang
Department of Mechanical Engineering, Chung Cheng Institute of Technology, National Defense University, Tahsi, Taoyuan, Taiwan 335, Republic of China
K.-Ch. Tsai
Department of Mechanical Engineering, Chung Cheng Institute of Technology, Taoyuan, Taiwan
J. Chern
Department of Mechanical Engineering, Chung Cheng Institute of Technology, Taoyuan, Taiwan

RESUMO

The Phase Doppler Particle Analyzer (PDPA) generally ignores the possibility that droplets may absorb light and the analysis of the phase Doppler technique is based on the assumption of transparent non-absorbing spherical particle. The purpose of the present work is to study the response of a phase Doppler particle analyzer to light-absorbing particles. Water drops with dye was used in this investigation and the method of geometric optics also was used as the basis for this study. Attempts were made to quantity the influence of the absorption on the measurement. The effect of the location of collection optics from different scatter on the PDPA was also studied. The vibrating-orifice droplet generator was used to generate the monodispersed drop stream. The trajectory of drop stream relative to the measuring volume and the laser polarization were also concerned.


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