An experimental investigation of gas-particle flows through diffusers in the freeboard region of fluidized beds
โ Scribed by Sunil R. Kale; John K. Eaton
- Book ID
- 107946513
- Publisher
- Elsevier Science
- Year
- 1985
- Tongue
- English
- Weight
- 805 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0301-9322
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๐ SIMILAR VOLUMES
An experimental and theoretical study was conducted to identify the flow behavior of gas and particulates in the freeboard of a gas-fluidized bed. The axial velocity and turbulence intensity distributions were measured along the centerline and across the freeboard. A laser Doppler velocimeter (LDV)
Greek symbols AP pressure drop between position 2 and top of bed, N/m2 APf pressure drop for minimum fluidisation, N/m2 AP, overall spouting pressure drop, N/m\* pb bulk density of solids, kg/m3 pr fluid density, kg/m' a true denisty of solids, kg/m'
A~traet--Tbe density and flux of particles in the freeboard of a freely bubbling fluidized bed is a function of the size, aspect ratio and frequency of bubbles erupting at the surface of the dense bed. To predict the velocity and amount of material thrown into the freeboard, a previous model for the
## Gas mixing in bubbling fluidized beds has been modelled, within the framework of the three-phase backmixing formulation, taking the influence of the circulation patterns of solids into account. It is shown that the inclusion of the solids movement patterns leads to axial dispersion of the gas i