CFD analysis of hydrodynamic studies of a bubbling fluidized bed

International Conference on Recent Advances in Materials, Mechanical and Civil Engineering

材料科学;机械制造;土木建筑工程

Rao, B.J.M.^1 ; Rao, K.V.N.S.^2 ; Janardhana, G Ranga^3

Dept. of Mech. Engg., VFSTR University, Andhra Pradesh

522 312, India^1

Dept. of Mech. Engg. B. V. R. I. T, Hyderabad

Telangana

502313, India^2

Dept. of Mech. Engg., JNTUA, Anantapur

Andhra Pradesh

51500, India^3

关键词: Bubbling fluidized bed;    Computational fluid dynamics simulations;    Computational Fluid Dynamics software;    Fluidization velocity;    Gasification chamber;    Hydrodynamic studies;    Particle diameters;    Static bed height;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/330/1/012090/pdf
DOI  :  10.1088/1757-899X/330/1/012090

来源: IOP

【 摘 要 】

Fluidization velocity is one of the most important parameter to characterize the hydrodynamic studies of fluidized bed asit determines different flow regimes. Computational Fluid Dynamics simulations are carriedfor a cylindrical bubbling fluidized bed with a static bed height 1m with 0.150m diameter of gasification chamber. The parameter investigated is fluidization velocity in range of 0.05m/s to 0.7m/s. Sand with density 2600kg/m3and with a constant particle diameter of sand 385μm is employed for all the simulations. Simulations are conducted using the commercial Computational Fluid Dynamics software, ANSYS-FLUENT.The bubbling flow regime is appeared above the air inlet velocity of 0.2m/s. Bubbling character is increased with increase in inlet air velocities indicated by asymmetrical fluctuations of volume fractions in radial directions at different bed heights.