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CFD Simulation and Verification Experiment of Fluidized Bed with a Adjustable Slit Height Blast Cap

Author: JiaZuo
Tutor: LiuGenFan
School: Huazhong University of Science and Technology
Course: Chemical Process Equipment
Keywords: Gas-solid A fluidized bed reactor Alumina Hood Euler Numerical Simulation Experiment
CLC: TQ051
Type: Master's thesis
Year: 2011
Downloads: 14
Quote: 0
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Abstract


Applied Computational fluid dynamics software Fluent 6.3.26 Eulerian two-fluid model of this study were two-dimensional and three-dimensional numerical simulation of gas-solid fluidized bed reactor with a 43 ring sewn -type hood fluidized state . Which the solid phase is a particle diameter 87.4μm and the B-type alumina particles of the true density of 3550kg/m3 , the gas phase is the normal temperature of 25 ° C in air , the density to 1.185 kg/m3 , the dynamic viscosity of 1.835 × 10-5 Pa · s . Before the implementation of the simulation in order to facilitate inspection and numerical simulation scheme is feasible , the first pair of stationary material storey 30mm, flow 30m3 / h of the fluidized - bed reactor is carried out verification experiments . From the numerical simulation of physical models is entirely experimental model to simplify the verification experiment . Focus on the impact on the the fluidized state 's numerical simulation of the four kinds of drag force model and two turbulence models , the final results showed that the amended syamlal-obrien drag model to simulate the flow of state and the actual situation in a two-dimensional numerical simulation more consistent , simulation and experimental comparison of the two parameters are mainly the particle phase the boiling highly Hbm , experimental rough measured a height of about 140mm , the simulation results of 100mm, and error of 28.6% , while the remaining three drag model bed swell height can not achieve the desired level of numerical simulation ineffective . More accurate multiphase flow model based on two - dimensional numerical simulation initially established to further simulate three-dimensional fluidized bed reactor 43 hood , in the case of poor simulation results of the hybrid grid and boundary layer type mesh 7 hood three-dimensional numerical simulation model , and eventually come to mesh the different conclusions that have a greater impact on the simulation results .

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