| 黄细彬,袁银忠.掺气挟沙对高速水流边界剪切力特性影响的分析[J].水利学报,1998,29(5):0024-0028 |
| 掺气挟沙对高速水流边界剪切力特性影响的分析 |
| Effect of aeration and sediment laden on boundary shear stress in high velocity flow |
| |
| DOI： |
| 中文关键词: 壁面剪切力 剪切力传感器 含沙水流 掺气 |
| 英文关键词: boundary shear stress transducer sediment laden flow aeration |
| 基金项目: |
|
| 摘要点击次数: 1724 |
| 全文下载次数: 80 |
| 中文摘要: |
| 在高速水流循环系统中，用自行研制的剪切力传感器分别量测了清水、掺气水流及挟沙水流壁面上的剪切力；实验表明，含沙掺气高速水流壁面剪切力的脉动值的概率密度函数分布基本符合正态分布规律；文中根据实测资料，分析了剪切力的时均值和脉动值与水流速度的关系；讨论了掺气及含沙量对壁面边界剪切力的影响；在同一流速下，剪切力的时均值及脉动值随着含沙量的增加而略有增加，随着掺气浓度的增加而降低。 |
| 英文摘要: |
| In a special circulating system with high velocity flow, boundary shear stresses in clear water flow, aerated flow and sediment laden flow are measured. It is found that the probability distribution of the fluctuating magnitude of boundary stress obeys the normal distribution. Based on the experimental data, the relationship between shear stress and flow velocity is analyzed and the effect of air and sediment laden content on boundary shear stress is discussed. It is shown that the higher the air concentration and the less the sediment laden, the less the shear stress. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |