| 内构件对高密度提升管内流体力学及径向气体混合的影响 |
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| 引用本文： | 杨艳辉,贾新莉,魏飞,金涌.内构件对高密度提升管内流体力学及径向气体混合的影响[J].中国化学工程学报,2001,9(3):291-296. |
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| 作者姓名： | 杨艳辉 贾新莉 魏飞 金涌 |
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| 作者单位： | DepartmentofChemicalEngineering,TsinghuaUniversity,Beijing100＂084,China |
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| 摘 要： | Effect of bluff internals on the hydrodynamics and lateral gas mixing was studied in a 0.186m ID high-density riser. With the bluff internals, the extremely non-uniform radial profiles of solid fraction and particle velocity become flat and the dense downflow layer near the wall disappears, indicating the significant enhancement of solid turbulence introduced by the internals. The fluctuation velocity and solid fraction transient signal analysis indicates a significant increase in fluctuation intensity near the wall region. The length influenced by the internals on the flow structure is about 1 meter. The lateral gas dispersion coefficient increases significantly as the bluff internals exist in the riser.
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| 关 键 词： | 内构件 高密度提升管 流体力学 径向气体混合 气体扩散模型 循环流化床 |
| 修稿时间： | |
Hydrodynamics and Lateral Gas Dispersion in a High-Density Circulating Fluidized Bed Reactor with Bluff Internals |
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| Yang Yanhui,JIN Yong,WEI Fei,JIA Xinli.Hydrodynamics and Lateral Gas Dispersion in a High-Density Circulating Fluidized Bed Reactor with Bluff Internals[J].Chinese Journal of Chemical Engineering,2001,9(3):291-296. |
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| Authors: | Yang Yanhui JIN Yong WEI Fei JIA Xinli |
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| Affiliation: | Department of Chemical Engineering, Tsinghua University, Beijing 100084, China |
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| Abstract: | Effect of bluff internals on the hydrodynamics and lateral gas mixing was studied in a 0.186m ID high-density riser. With the bluff internals, the extremely non-uniform radial profiles of solid fraction and particle velocity become flat and the dense downflow layer near the wall disappears, indicating the significant enhancement of solid turbulence introduced by the internals. The fluctuation velocity and solid fraction transient signal analysis indicates a significant increase in fluctuation intensity near the wall region. The length influenced by the internals on the flow structure is about 1 meter. The lateral gas dispersion coefficient increases significantly as the bluff internals exist in the riser. |
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| Keywords: | high-density riser bluff internal solid fraction particle velocity transient analysis gas mixing gas dispersion model |
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