Theory of relaxation autooscillations of a gas-fluidized bed

Borodulya, V. A.; Buevich, Yu. A.; Zav'yalov, V. V.

doi:10.1007/bf00861358

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“…Such oscillations, for the development of which a very large windbox volume of the apparatus is needed and a low resistance of the grid, were studied well in the work [6] and are known mainly from laboratory research. Two kinds of the bed auto-oscillations are distinguished.…”

Section: Introductionmentioning

confidence: 99%

Relaxation auto-oscillations in a fluidized bed

Tuponogov¹,

Рыжков²,

Baskakov³

et al. 2008

Thermophys. Aeromech.

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Oscillations of nonuniform fluidized bed in the slugging regime are considered. A nonlinear onedimensional model of bed oscillations is developed and investigated, including the equations of the bed surface motion and the oscillations of the pressure drop in the bed for the phase of the surface ascent and for the phase of its fall. A quasi-discrete process of the gas escape from the layer with large bubble and the relaxation (discontinuous) type of oscillations of the bed surface and of the pressure, which are related to the above process, are shown based on the model analysis, the obtained numerical solutions, and the comparison with experiment.

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Section: Introductionmentioning

confidence: 99%