| 费祥俊,吴保生,傅旭东.两相非均质流输沙平衡关系及挟沙力研究[J].水利学报,2015,46(7):757-764 |
| 两相非均质流输沙平衡关系及挟沙力研究 |
| Equilibrium sediment transport relation and sediment carrying capacity of two-phase heterogeneous flows |
| 投稿时间：2014-08-11 |
| DOI：10.13243/j.cnki.slxb.20140975 |
| 中文关键词: 高含沙水流 非均质流 输沙能力 不淤流速 阻力特性 |
| 英文关键词: Hyperconcentrated flow heterogeneous flow sediment carrying capacity non-deposition velocity resistance characteristics |
| 基金项目:国家“十二五”科技支撑计划资助项目(2012BAB02B02) |
|
| 摘要点击次数: 3771 |
| 全文下载次数: 101 |
| 中文摘要: |
| 对非均质流挟沙力研究现状分析表明,目前悬移质水流挟沙力公式存在的问题:一是未能正确反映水流势能转化为动能过程中必须考虑的阻力因子;二是未能正确处理泥沙颗粒的非均匀性特点;三是未能正确计算悬液黏度对颗粒沉速的影响。本文基于大量室内平衡输沙试验及野外河渠准平衡输沙观测资料,建立了非均匀沙悬移质输沙平衡关系,得到了新的适用于各级含沙量的非均匀沙悬移质挟沙力公式。进而根据建立的输沙平衡关系,得到了挟沙水流的不淤流速及阻力坡降关系,可用于河道治理及渠系设计。 |
| 英文摘要: |
| A review of present research on sediment carrying capacity of two-phase heterogeneous flows reveals several shortcomings in existing suspended-sediment carrying capacity formulas, which firstly do not reflect the friction factor correctly when potential energy converts into kinetic energy, and secondly do not account the non-uniformity of sediment particles well and thirdly, cannot correctly calculate the effect of viscosity of suspended sediment solution on fall velocity of sediment particles. An equilibrium relation of non-uniform sediment transport has been established and sediment carrying capacity formulas are obtained, which can be used for non-uniform sediment with various amount of sediment concentrations. At top of this, relations of non-deposition velocity and friction slope for two-phase heterogeneous flows have also been obtained,which can be used for design of river training and channels. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |