Similarity of transport processes in disperse systems with suspended particles

Teplitskiy, Yu.S.

doi:10.1016/s0017-9310(01)00162-4

Cited by 5 publications

(1 citation statement)

References 18 publications

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“…Нарушение автомодельности по числу N, очевидно, связано с возрастающим влиянием уноса частиц из кипящего слоя. Как показано в [9], более физичной величиной, характеризующей интенсивность ожижения частиц в неоднородном (с пузырями) кипящим слоем, является не число Интересно отметить, что в этих условиях величина ( )…”

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Investigation of the regularities of vortical flows in a cyclone-bed chamber

Pitsukha

Buchilko

Teplitskii

2018

Vescì Akademìì navuk Belarusì. Seryâ fizika-tehničnyh navuk

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Experimental investigation of the radial distributions of tangential and longitudinal velocities, total and static pressures in the vortex zone of a cyclone-bed chamber of diameter 0.21 m has been carried out. The experiments were carried out at various regime parameters (fraction of bottom blast, total air volume flow) and geometric parameters (diameter and shape of the outlet) of the chamber, and also in the presence of a fixed or fluidized bed of granular material. The influence of nonisotherm of bottom and tangential blast on the distribution pattern of velocity and pressure in the vortex zone of the cyclone-bed chamber is investigated. There was determined the influence of bottom blast temperature on the longitudinal velocity of air in the central part of the vortex zone chamber. It is shown that the diameter of the outlet has a significant effect on the pressure in the chamber. The longitudinal velocity in the central part of the chamber is practically independent of the shape of the outlet. The presence of the fluidized bed has an effect on the hydrodynamics of the cyclone-bed chamber vortex zone. In the presence of the fluidized bed there has been a violation of the self-similarity of hydrodynamic dimensionless parameters distribution in the vortex zone. The obtained experimental data were summarized within the framework of the similarity theory with the use of a dimensionless quantity characterizing the hydrodynamics of an inhomogeneous fluidized bed – the Froude number (Fr). The use of the Froude number makes it possible to take into account the effect of the fluidized bed hydrodynamics on the features of air velocity and pressure distributions in the vortex zone, and also takes into account the influence of such an important factor as the fraction of bottom blast.

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