| 钟德钰,张红武.明渠挟沙水流中悬移质的床面平衡浓度[J].水利学报,2006,37(7):789-794 |
| 明渠挟沙水流中悬移质的床面平衡浓度 |
| Equilibrium bed concentration of suspended sediment |
| 投稿时间：2005-10-12 |
| DOI： |
| 中文关键词: 挟沙水流 悬移质 床面平衡浓度 统计动力学 |
| 英文关键词: sediment laden flow suspended load equilibrium bed concentration statistical dynamics probability density function (PDF) |
| 基金项目:黄河研究联合基金项目(50339020);国家自然科学基金资助项目(50209005) |
|
| 摘要点击次数: 1629 |
| 全文下载次数: 751 |
| 中文摘要: |
| 本文通过泥沙颗粒运动的概率密度输运方程，推导出床面附近运动的泥沙颗粒的概率密度函数及相应的泥沙颗粒向上运动和向下运动的通量，建立了计算明渠挟沙水流悬移质床面平衡浓度的关系式。通过与试验资料及经验公式的比较对本文建立的关系式进行了检验，结果表明本文所得计算公式与实际符合较好，可用于悬沙床面平衡浓度的计算。 |
| 英文摘要: |
| The equilibrium bed concentration of the suspended sediment carried by turbulent flows in alluvial channels is studied. The probability density function (PDF) of the moving sediment particles on riverbed and upward and downward mass flux of the particles picking up from or sweeping on to bed surface by turbulence bursts are deduced from the transport equation, and the formula for calculating the equilibrium bed concentration is derived according to the principle of mass balance between upward and downward sediment particles. The comparisons with flume experimental data and three empirical formulas show that the proposed formula has fairly good accuracy in predicting the equilibrium bed concentration. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |