An Experimental Investigation of Fluidization of Pebble Beds by Flows of Single-Phase and Two-Phase Media and Conditions for Prevention of this Fluidization
| Autor: | M. V. Konditerov, A. I. Tropkina, G. A. Filippov, L. E. Melamed, V. P. Mastyukin |
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| Rok vydání: | 2005 |
| Předmět: | |
| Zdroj: | High Temperature. 43:452-459 |
| ISSN: | 1608-3156 0018-151X |
| DOI: | 10.1007/s10740-005-0084-6 |
| Popis: | An experimental investigation is performed of the process of fluidization of pebble beds by single-phase (water) and two-phase media. Both free beds and those loaded from above (with constant and variable loads) are investigated. Results are given for the critical velocity of the beginning of fluidization. A significant difference is revealed between the processes of fluidization by single-phase and two-phase media. A strong effect of the bubbling of gas through water is observed in the case of a two-phase medium. A calculation procedure based on the value of average dynamic velocity of the mixture is suggested for the description of the process of fluidization in a two-phase medium. The dependence of the critical velocity of the beginning of fluidization on the load value is found for a loaded bed. The forces required to prevent fluidization in a bed are analyzed with an arbitrary orientation of the apparatus. The load dependence of the friction force of the bed is determined experimentally. |
| Databáze: | OpenAIRE |
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