| 王延贵,胡春宏,朱毕生.模型沙起动流速公式的研究[J].水利学报,2007,38(5):518-523 |
| 模型沙起动流速公式的研究 |
| Study on formula of incipient velocity of sediment in model test |
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| DOI： |
| 中文关键词: 模型沙 水槽试验 起动状态 起动流速公式 |
| 英文关键词: model test sediment experimental data formula starting state incipient velocity |
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| 中文摘要: |
| 对现有泥沙起动公式的分析表明细颗粒泥沙起动流速大于试验值，本文利用大量的模型沙起动流速试验资料，对不同材质、粒径的各种模型沙，建立了起动流速的通用计算公式，该式与试验资料吻合良好。通过研究模型沙的起动状态与起动流速的变化规律，指出模型沙个别起动、少量动、普遍动对应的起动流速间具有线性关系，进而给出了模型沙不同状态的起动流速计算公式。 |
| 英文摘要: |
| The analysis on current used formulas for determining the incipient velocity of sediment for model test indicates that the calculated velocity always higher than that obtained from experiment. A universal formula for improving the calculation accuracy is proposed, in which the parameters are determined according to the property and size of the sediment. The validity of the formula is verified by a lot of experimental data. The further investigation shows that the incipient velocity varies with the starting states of sediment. It includes the states of single sediment grain begin to move, a few of sediments starting to move and a lot of sediments starting to move. The formulas for determining the incipient velocity of different starting states are suggested. |
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