针对光催化制氢反应器的特点,基于Sato叠加假设考虑颗粒对液相湍流的影响,运用CFX的双流体模型,对反应器水平管道内的液固两相流动进行了数值模拟,得到了相应的催化剂颗粒分布、湍流强度分布及相速度分布.结果表明,在液固两相流动条件下,催化剂颗粒在底部形成沉积层,而在管道中心区域,形成拟均匀的悬浮流动形态,这种类型的催化剂颗粒分布对光催化反应的充分进行是不利的.根据两相的速度分布,发现相间的滑移并不明显,这说明催化剂颗粒几乎是随着流体流动的,在实际中,可以运用代数滑移模型(ASM)对这种流动进行模拟计算.
参考文献
| [1] | Cassano A E;Alfano O M.Reaction Engineering of Suspended Solid Heterogeneous Photocatalytic Reactors[J].Catalysis Today,2000(58):167-197. |
| [2] | A.Brucato;A.E.Cassano;F.Grisafi .Estimating Radiant Fields in Flat Heterogeneous Photoreactors by the Six-Flux Model[J].AIChE Journal,2006(11):3882-3890. |
| [3] | Gianluca Li Puma;Alberto Brucato .Dimensionless analysis of slurry photocatalytic reactors using two-flux and six-flux radiation absorption-scattering models[J].Catalysis Today,2007(1/2):78-90. |
| [4] | Newitt D M;Richardson J F;Abbot M et al.Hydraulic Conveying of Solids in Horizontal Pipes[J].Chemical Engineering Research and Design,1955,33a:93-113. |
| [5] | Wilson K C.A Unified Physically-Based Analysis of SolidLiquid Pipeline Flow[A].,1976:1-16. |
| [6] | A. A. Troshko;Y. A. Hassan .A two-equation turbulence model of turbulent bubbly flows[J].International Journal of Multiphase Flow,2001(11):1965-2000. |
| [7] | P. Doron;D. Barnea .Flow pattern maps for solid-liquid flow in pipes[J].International Journal of Multiphase Flow,1996(2):273-283. |
| [8] | Serizawa A;Kataoka I;Michiyoshi I .Turbulence Structure of Air-Water Bubbly Flow[J].International Journal of Multiphase Flow,1975,2(03):221-259. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%