Optical measurements of local gas and particle velocity in an upward flowing dilute gas-solids suspension.

M. Maeda, Koichi Hishida, T. Furutani

Research output: Contribution to journalArticle

Abstract

Local gas and particle velocities in a dilute gas-solids suspension of a fully developed pipe flow are measured with a modified laser Doppler anemometer, whose signal processing consists of an electronic circuit selecting signals of gas and particle velocity by filtering their Doppler frequencies and by comparing the light scattering intensity of an individual particle. Experiments are performed using three kinds of spherical solid particles for mass loading ratios up to 0.54 and pipe Reynolds numbers ranging from 1 x 10SUB4 to 2 x 10SUB4. The results indicate that an addition of small amounts of particles to air flow causes the profiles of velocity and turbulence intensity to flatten at the central core of pipe, and that the flattening of air velocity profiles is correlated to a nondimensional number derived from momentum balance estimated by a drag force of particles in suspension flow. (A)

Original languageEnglish
Journal[No source information available]
Issue number(ed.), New York, U.S.A., Am. Soc. Mech. Engrs., 1980, p.211-2...
Publication statusPublished - 1980 Jan 1
Externally publishedYes

ASJC Scopus subject areas

  • Engineering(all)

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    Maeda, M., Hishida, K., & Furutani, T. (1980). Optical measurements of local gas and particle velocity in an upward flowing dilute gas-solids suspension. [No source information available], ((ed.), New York, U.S.A., Am. Soc. Mech. Engrs., 1980, p.211-2...).