Solid fraction profile

Differential pressure measurements were made between several vertical elevations within the bed. The probability density function of the cold model and combustor gave very close agreement (Fig. 35). The solid fraction profiles were obtained from the vertical pressure profile with a hydrostatic assumption. The cold model solid fraction profile showed very close agreement with data taken from pressure taps in two different locations within the combustor (Fig. 36). The solid fraction shows a... 

Figure 36. Solid fraction profile comparisons for Tidd PFBC and cold model based on simplified scaling laws. (From Glicksman and Farrell, 1995.)...

Figure 37. Bubbling bed solid fraction profile for u0/um = 1.2 for two different solid-to-gas density ratios.

Figure 49. Solid fraction profiles, glass/plastic viscous limit scaling density ratio mismatched, low velocity case. (From Glicksman et at., 1993a.)...

Ran X, Wang ZW, Wei F, Jin Y. Particle velocity and solids fraction profiles of a swirling flow in a riser. Proceedings of the Sixth International Conference on Circulating Fluidized Bed, Wurzburg, Germany, Aug. 1999, pp 131-139. 

Horio et al. (1989) experimentally verified their proposed circulating fluidized bed scaling laws. The solid-to-gas density ratio was not varied in the tests thus they effectively verified the simplified set of scaling laws. Two cold scaled CFBs, fluidized using ambient air, were used in the verification. Good agreement in the axial solid fraction profiles was obtained for most of the conditions tested. An optical probe was used to verify similarity in the annular flow structures and the cluster velocities. 

Glicksman et al. (1993b) verified the simplified scaling laws for hot beds by comparing the solid fraction profiles for the Studsvik bed, the one-quarter scale cold... 

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