| 挟沙水流综合糙率系数的研究 |
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| 引用本文： | 邓安军,郭庆超,陈建国.挟沙水流综合糙率系数的研究[J].泥沙研究,2007(5):24-29. |
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| 作者姓名： | 邓安军 郭庆超 陈建国 |
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| 作者单位： | 中国水利水电科学研究院,北京,100044 |
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| 基金项目： | 国家科技支撑计划;中国水利水电科学研究院青年基金 |
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| 摘 要： | 在现有研究成果的基础上，通过分析大量天然河道实测资料和他人的水槽试验资料，发现在挟沙水流中，综合糙率系数与水深、流量的相关性较差；与含沙量的相关性较好，并且糙率系数随含沙量的增加先减小后增大；在一定佛氏数条件下，糙率系数与佛氏数的相关性最好，且随佛氏数的增加而减小，可以根据佛氏数来计算糙率系数，但在较大佛氏数后，二者关系出现“向上翘”现象。
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| 关 键 词： | 高含沙水流 综合糙率系数 含沙量 佛汝德数 |
| 文章编号： | 0468-155X（2007）05-0024-06 |
| 修稿时间： | 2007-02-05 |
Study on the roughness in sediment-laden flows |
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| DENG An-jun,GUO Qing-chao,CHEN Jian-guo.Study on the roughness in sediment-laden flows[J].Journal of Sediment Research,2007(5):24-29. |
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| Authors: | DENG An-jun GUO Qing-chao CHEN Jian-guo |
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| Affiliation: | China Institute of Water Resources and Hydropower Research, Beijing 100044, China |
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| Abstract: | Based on the analyses of the field and flume experimental data,the integrated roughness of sediment-laden flows has been studied.It indicates that the roughness has a poor relationship with the flow discharge and depth,but a good relationship with sediment concentration.Besides,the roughness increases first and then decreases with the increase of sediment concentration.The study also shows that for a certain range of Froude number(Fr),the roughness has a very good relationship with the Fr and therefore the roughness can be calculated if Fr is known. |
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| Keywords: | hyperconcentrated flow roughness sediment concentration Froude number |
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