Gas–solid structure in the vicinity of a sparger nozzle in a fluidized bed

Sauriol, Pierre; Cui, Heping; Chaouki, Jamal

doi:10.1016/j.powtec.2012.05.008

Cited by 6 publications

(2 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The particle volume fraction thresholds, i.e., 2.5 × 10 −4 -1.0 × 10 −3 , were selected based on the range of the solids volume fraction in the bulk jet surroundings. Similarly, change in mean particle volume fraction is used to define the characteristics lengths of gas jets penetrating into a fluidized bed [29]. Also indicated in Table 3 are the jet half-angles predicted using the same correlation that was applied to the cold flow cases, i.e., Equation 2with an a factor of 17.3, which falls within the predicted value boundaries of the CFD simulations.…”

Section: Model Fittingmentioning

confidence: 84%

“…The particle volume fraction thresholds, i.e., 2.5 × −4 -1.0 × 10 −3 , were selected based on the range of the solids volume fraction in the bulk jet surroundings. Similarly, change in mean particle volume fraction is used to define the characteristics lengths of gas jets penetrating into a fluidized bed [29]. Also Two CFD simulations, with similar conditions as the experiments [28], were analyzed to determine the jet half-angle for reactive flow ( Table 3).…”

Section: Model Fittingmentioning

confidence: 99%

See 1 more Smart Citation

Dry Fuel Jet Half-Angle Measurements and Correlation for an Entrained Flow Gasifier

et al. 2018

View full text Add to dashboard Cite

Reduced order models (ROMs) are increasingly applied to entrained flow gasification development due to reduced computational requirements relative to computational fluid dynamics (CFD) models. However, they require greater a posteriori knowledge of the reactor physics. A significant parameter influencing ROM outputs is the jet half-angle of the solid fuel and oxidant mixture in the gasifier. Thus, it is important to understand the geometry of the jet in the gasifier, and how it is dependent on operating parameters, such as solid and carrier gas flow rates. In this work, an existing model for jet half-angles, which considers the ratio of surrounding gas density to jet core density, is extended to a dry solids jet with impinging gas. The model is fitted to experimental jet half-angles. The jet half-angle of a non-reactive flow was measured using laser-sheet imaging for solid fluxes in the range of 460–880 kg/m2·s and carrier gas fluxes in the range of 43–90 kg/m2·s at the transport line outlet. Jet half-angles ranged from 5.6° to 11.3°, increasing with lower solid/gas loading ratios. CFD simulations of two reactive conditions, with solid and gas fluxes similar to experiments, were used to test the applicability of the proposed jet half-angle model.

show abstract

Section: Model Fittingmentioning

confidence: 84%

Section: Model Fittingmentioning

confidence: 99%