| 李大鸣,吕小海,焦润红.泥沙静水沉降阻力系数[J].水利学报,2004,35(1):0001-0005 |
| 泥沙静水沉降阻力系数 |
| Resistance coefficient of sediment deposition in still water |
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| DOI： |
| 中文关键词: 泥沙沉降 阻力系数 球度系数 形状系数 球体绕流解 |
| 英文关键词: sediment deposition resistance coefficient equivalent spherical coefficient flow around a sphere |
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| 中文摘要: |
| 作者引用由渐近匹配展开方法所确定的N-S方程球体绕流渐近展开解将蠕变流推广到急变流的球体绕流解，导出了泥沙沉降阻力系数的计算公式。在此公式基础上，用天然泥沙雷诺数替代球体雷诺数，讨论了球度系数与形状系数之间的关系，提出了圆角形、棱角形天然泥沙颗粒沉降阻系数计算公式，并将不同球度系数、形状系数与阻力系数公式的成果与Schulz实验资料相比较，结果两者趋势相同，数值吻合较好。 |
| 英文摘要: |
| The asymptotic expansion matched method is applied to calculate the flow around a sphere based on N-S equation. The concept of equivalent spherical particle Reynolds number for irregular shaped particle is proposed and the formula for calculating the deposition resistance coefficient of irregular particle characterized by equivalent sphere in still water is deduced. The validity of the formula is verified by experiment data. |
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