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Proceedings Paper

Application of high-speed photography with rapidly changing color to a cold model circulating fluidized bed
Author(s): Zengrong Zheng; J. R. Grace; Jingxu Zhu
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Paper Abstract

A new technique, named `Microprocessor-Controlled Stroboscope High Speed Photography,' has been tested. This instrument uses sequential flashes of different colors, with the frequency controlled by a microprocessor to freeze the motion of individual moving tracer particles. By this means, a series of different color images of moving particles can be recorded on each frame of film. Accordingly, the velocities, accelerations, and trajectories of moving particles can be determined, and circulation patterns can be traced. Tests were carried out with particles of 100 to 500 micrometers diameter in a circulating fluidized bed (CFB), with measured velocities from 0.56 m/s to 10 m/s to demonstrate the usefulness of the new technique.

Paper Details

Date Published: 1 January 1993
PDF: 9 pages
Proc. SPIE 1801, 20th International Congress on High Speed Photography and Photonics, (1 January 1993); doi: 10.1117/12.145721
Show Author Affiliations
Zengrong Zheng, Zhejiang Univ. (China)
J. R. Grace, Univ. of British Columbia (Canada)
Jingxu Zhu, Univ. of British Columbia (Canada)


Published in SPIE Proceedings Vol. 1801:
20th International Congress on High Speed Photography and Photonics
John Marks Dewey; Roberto G. Racca, Editor(s)

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