挟沙水流卡门常数是反映固液两相流中泥沙对水流结构影响的重要参数之一。鉴于此, 回顾了卡门常数的来历、实质和卡门常数的影响因素、物理意义, 总结了国内外因考虑因素不同而导出的卡门公式, 接着对研究得到的卡门常数作了一个简要客观的评价, 最后指出卡门常数进一步研究需要注意的问题从能量输移理论进一步弄清楚能量分配机制, 同时需要更精确的试验资料进行分析。
Abstract
The Von Karman constant of sediment-laden flow is considered as one of the most important parameters reflecting the influence of sediment transport on flow structure. To describe the flow structure, the origins of the Karman constant in real terms, the Karman constant factors and physical significance are reviewed, then the Karman formulas in China and abroad in consideration of different factors are summarized. Lastly, a brief and objective assessment on the Karman constant is made, and the problems that need further research are pointed out the energy distribution mechanism should be explored in terms of energy transport theory, and more accurate test data are required.
关键词
卡门常数 /
挟沙水流 /
对数流速分布 /
混掺长度
Key words
Karman constant /
sediment-laden flow /
flow velocity distribution in logarithms /
mixing length
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参考文献
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