Laser-based particle measurements of spherical and nonspherical particles

Citation
Dl. Black et Mq. Mcquay, Laser-based particle measurements of spherical and nonspherical particles, INT J MULT, 27(8), 2001, pp. 1333-1362
Citations number
45
Categorie Soggetti
Mechanical Engineering
Journal title
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
ISSN journal
03019322 → ACNP
Volume
27
Issue
8
Year of publication
2001
Pages
1333 - 1362
Database
ISI
SICI code
0301-9322(200108)27:8<1333:LPMOSA>2.0.ZU;2-1
Abstract
Experiments were performed to collect a detailed set of particle informatio n in a co-axial jet and a swirling flow to assess the influence of particle shape on the particle dynamics. Spherical glass beads and a ground glass p owder of the same material and similar size distribution were used for the experiments. The experiments presented also provide a comprehensive data se t of particle information in a well-defined laboratory environment suitable for model validation. Results presented were measured with a two-component phase-Doppler particle analyzer (PDPA) and contain detailed particle veloc ity information for both spherical and nonspherical particles. Significant differences between spherical and nonspherical particles were observed for both co-axial jet and swirling flows in regions where velocity gradients ar e high. In general, nonspherical particles in the 30-70 mum range were able to follow the gas-phase velocity much better than the spherical particles in the same size range. Size-resolved velocity information was also collect ed directly below the inlet to measure the different velocity characteristi cs of different size classes within the overall distribution. (C) 2001 Else vier Science Ltd. All rights reserved.