| 湍动流化床中的气体返混 |
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| 引用本文： | 张秀成,张小平.湍动流化床中的气体返混[J].西北大学学报,1995,25(1):79-83. |
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| 作者姓名： | 张秀成 张小平 |
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| 作者单位： | 西北大学化工系 |
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| 摘 要： | 在内径２００ｍｍ，高５５００ｍｍ的流化床实验装置上，用氧气，点源示踪、均时取样的方法，对湍动流化床中的气体返混进行了测定。实验结果表明湍动床存在着明显的轴向返混，轴向扩散系数与气速有关。用拟均相一维扩散模型进行处理，线性回归法求取模型参数，并将轴向扩散系数进行关联，可得到相应的关联式。
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| 关 键 词： | 流化 轴向返混 湍流 轴向扩散系数 |
Bacmixing in a Turbulent Fluidized Bed |
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| Zhang Xiucheng, Zhang Xiaoping.Bacmixing in a Turbulent Fluidized Bed[J].Journal of Northwest University(Natural Science Edition),1995,25(1):79-83. |
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| Authors: | Zhang Xiucheng Zhang Xiaoping |
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| Abstract: | The extent of axial gas backmixing for turbulent fluidization in a fluidized bed testing unitof 200 mm inside diameter and 5 500 mm height were measured using continuous injection of a oxygentracer. Experimental results indicate that the extents of axial gas backmixing are related the gas veloc-ity. As a result,a generalized correlations of the gas dispersion coefficient is obtained. |
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| Keywords: | fluidized beds gas backmixing turbulent gas dispersion coefficient |
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