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考虑沙粒带电情形下的单宽输沙率经验公式 被引量:1

A General Model Predicting the Streamwise Sand Transport Rate with Saltating Sand Charged
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摘要 单宽输沙率是风沙流研究的一个重要参数。基于考虑跃移运动沙粒带电的风沙流演化过程理论模型,对单宽输沙率进行了大量详细的数值模拟,在此基础上,拟合得到一个便于实际应用的单宽输沙率经验公式。该公式包含来流风速、沙粒粒径和平均荷质比等影响风沙流演化过程的重要可测参数。与已有模型相比较发现,通过对公式中参数沙粒荷质比赋予(-160μc.kg-1,0μc.kg-1)范围内的值,预测的输沙率与现有许多输沙率预测公式的预测结果都能符合,意味着静电作用可能是导致众多输沙率公式预测结果不统一的原因之一。 The streamwise sand transport rate, also known as wind-blown sand transport rate, is a vital parameter in wind-blown sand flux. Based on numerical simulation of the wind-blown sand saltation with the sand electrification, the streamwise sand transport rates are calculated in this paper. By analyzing the results, a predicting model for wind-blown sand transport rate is established, which is a function of particle diameter, wind velocity and the electrical charge. The predicted mass transport rates agree well with those predicted by many other models as the parameter of charge-to-mass ratio is set to be in the range of (160μc·kg,0μc·kg^-1 ), implying that sand electrification may be one of the reasons of discrepancy among models.
作者 胡文文 王萍
出处 《中国沙漠》 CSCD 北大核心 2011年第3期613-617,共5页 Journal of Desert Research
基金 国家重点基础研究发展规划项目(2009CB421304) 国家自然科学基金项目(10872082 11072097) 教育部科学研究重大项目(308022) 兰州大学"中央高校基本科研业务费专项资金"重点项目(lzujbky-2009-k01)共同资助
关键词 单宽输沙率 预测公式 荷质比 数值模拟 streamwise sand transport rate predicting model charge-to-mass ratio numerical simulation
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参考文献31

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二级参考文献154

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同被引文献18

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