| 论明槽挟沙水流的阻力 |
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| 引用本文： | 黄才安,赵晓冬,龚敏飞.论明槽挟沙水流的阻力[J].水力发电学报,2004,23(1):69-73. |
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| 作者姓名： | 黄才安 赵晓冬 龚敏飞 |
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| 作者单位： | 1. 扬州大学水利科学与工程学院,扬州,225009
2. 南京水利科学研究院河港研究所,南京,210024 |
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| 基金项目： | 江苏省高校省级重点实验室开放课题 (KJS0 1 0 60 ) |
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| 摘 要： | 从挟沙水流的能量平衡原理出发 ,指出泥沙的运动从两个方面影响水流的阻力 :一是由于卡门常数的减小而引起的阻力减少 ,二是由于推移质泥沙的存在而引起的阻力增大。两者对阻力的作用正好相反 ,因而挟沙水流阻力比清水可能减小、增大及不变 ,取决于两者的对比程度。并从理论上给出了动平整床面挟沙水流阻力的计算公式 ,该公式的计算结果与实测资料吻合较好
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| 关 键 词： | 河流泥沙工程学 水流阻力 能量平衡 挟沙水流 |
| 修稿时间： | 2003年1月17日 |
Study on the resistance of silt-laden flows in open chammels |
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| HUANG Caian ,ZHAO Xiaodong ,GONG Minfei.Study on the resistance of silt-laden flows in open chammels[J].Journal of Hydroelectric Engineering,2004,23(1):69-73. |
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| Authors: | HUANG Caian ZHAO Xiaodong GONG Minfei |
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| Affiliation: | HUANG Caian 1,ZHAO Xiaodong 2,GONG Minfei 1 |
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| Abstract: | Started from the energy balance equation of silt laden flow,there are two aspects that the silt movement influences on the flow resistance:(1)decrease of resistance caused by reduction of Karman's constant;(2)increase of resistance caused by the bed load movement.These two aspects have their opposite effects on flow resistance,relative to the clear water,resistance of silt laden flow may be decreased,increased or be constant. The calculating results by the equation,derived from the theory of silt laden flow,are very closely agreed with the measured data. |
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| Keywords: | river sediment engineering flow resistance energy balance silt laden flow |
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