Panariello, L;
Materazzi, M;
Solimene, R;
Salatino, P;
Lettieri, P;
(2017)
X-ray imaging of horizontal jets in gas fluidised bed nozzles.
Chemical Engineering Science
, 164
pp. 53-62.
10.1016/j.ces.2017.01.055.
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Abstract
The design of the fluidising air distributors, or nozzles, is one of the most important aspects influencing operation of fluidised beds at industrial scale. In this work, the study of the hydrodynamics in gas-solid fluidized beds where the primary gas injection is achieved through a nozzle-type gas distributor has been carried out, using an innovative X-ray imaging technique. Qualitative and quantitative results are reported, with particular focus on jets penetration length and their evolution. Results show that the lighter and the finer are the particles, the larger is the jet penetration. Since the experimental data do not match predictions available in literature, a new non-dimensional correlation based on hydrodynamic scaling and Froude number is also proposed. The new correlation takes into account the effects of jet velocity, particle density and particle size. A tentative mechanistic explanation for the departure from purely hydrodynamic scaling is offered.
| Type: | Article |
|---|---|
| Title: | X-ray imaging of horizontal jets in gas fluidised bed nozzles |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.ces.2017.01.055 |
| Publisher version: | http://doi.org/10.1016/j.ces.2017.01.055 |
| Language: | English |
| Additional information: | © 2017 Elsevier Ltd. All rights reserved. This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Science & Technology, Technology, Engineering, Chemical, Engineering, X-ray imaging, Fluidised beds, Gas nozzles, Jet penetration, MAGNETIC-RESONANCE, PENETRATION LENGTH, ATTRITION, PARTICLES, MODEL |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1555807 |
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