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| 水平管道对流化床中气泡成长的影响 |
| Influence of the horizontal tube array on bubble growth in a fluidized bed |
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| DOI： |
| 中文关键词: 模拟 FLUENT 流化床 水平管道 速度 气泡 |
| 英文关键词:simulation FLUENT fluidized bed horizontal tube array velocity bubble |
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| 摘要点击次数: 3010 |
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| 中文摘要: |
| 利用FLUENT模拟了二维流化床内水平管道和气体在不同进口速度下对气泡成长的影响。结果表明，流化床中存在水平管道对气泡的成长有着显著的影响。与未加水平管道相比，床内由于水平管道的阻碍和干扰，气泡的生成和成长速度相对缓慢，气泡的形状在不同时刻也发生较大的变化。而在同一条件下仅气体的进口速度不同时，当床内存在管列，气体进口速度在0.5 m·s-1左右时流化床内的气固混合相对更充分，当进口速度小于0.17 m·s-1或大于0.9 m·s-1时床内气泡和颗粒的分布相对规则和稳定。研究表明，在二维流化床中无论是进口气体的速度还是水平管道都会对气泡的生成和成长产生很大的影响。 |
| 英文摘要: |
| In this paper, the influence of horizontal tubes and the inlet gas velocity on bubble growth in a two-dimensional fluidized bed was numerically investigated using FLUENT. The results showed that the horizontal tubes in the fluidized bed have a significant influence on the growth of bubbles. The bubble formation and growth rates are relatively low due to the obstruction and interference by the horizontal tubes and the bubble shape changes greatly at different times. With horizontal tubes in the fluidized bed, the solid phase is mixed with the gas phase more fully at an inlet gas velocity of ca. 0.5 m·s-1. When the inlet gas velocity is less than 0.17 m·s-1 or greater than 0.9 m·s-1, the distributions of bubbles and granules in fluidized bed are relatively regular and steady. Both the inlet gas velocity and the horizontal tube array have a strong impact on the bubble formation and growth in the two-dimensional fluidized bed. |
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