Title :
CFD simulation of hrodynamics in bubble columns with perforated plate distributor
Author :
Nana Qi ; Kai Zhang ; Yongping Yang ; Hu Zhang
Author_Institution :
State Key Lab. of Alternate Electr. Power Syst. with Renewable Energy Sources, China Electr. Power Univ., Beijing, China
Abstract :
In order to design and scale up an efficient slurry bubble reactor for liquid fuel synthesis, the effects of distance between adjacent holes, superficial gas velocity, initial liquid height and opening area on local profile of phase holdup are explored experimentally and numerically in the bubble columns with perforated plate distributor. Simulated overall gas holdup by the standard k-ε turbulence model in the commercial CFD software platform (ANSYS CFX 10.0) show good agreement with experimental measurement within the column. The results show that an obvious jet flow from each holes and bed surface fluctuation at the liquid surface can be observed at both superficial gas velocities and distances between adjacent holes. The greater the superficial gas velocity, the deeper the jet flow. Smaller distance between adjacent holes and higher superficial gas velocity can make the jet flow merge in a lower axial position. The effect of initial liquid height on the flow pattern of the column can be ignored, while a larger overall gas holdup can be obtained when operated at a higher superficial gas velocity or a larger opening area of the distributor as the dead zone is weaken.
Keywords :
bubbles; chemical reactors; computational fluid dynamics; fuel processing; hydrodynamics; jets; syngas; turbulence; ANSYS CFX 10.0; CFD simulation; CFD software platform; bed surface fluctuation; bubble columns; hydrodynamics; jet flow; liquid fuel synthesis; perforated plate distributor; slurry bubble reactor; standard k-ε turbulence model; standard k-epsilon turbulence model; superficial gas velocity; Computational fluid dynamics; Fuels; Hydrodynamics; Inductors; Liquids; Mathematical model; Slurries; CFD simulation; buble column; hydrodynamics; liquid fuel synthesis; perforated plate distributor;
Conference_Titel :
Materials for Renewable Energy and Environment (ICMREE), 2013 International Conference on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4799-3335-8
DOI :
10.1109/ICMREE.2013.6893774