摘要
在重力作用下,泥沙沿输送管道横截面的分布呈现上层稀疏下层浓密的特点。据此可将整个流动简化为具有不同平均速度和平均浓度的两层流动。以中沙在直径为150 mm管道上的实测流动为例,用迭代方法确定了两层流动的分界面位置,结果表明两层流动模型能够刻画泥沙在管道中流动的主要特征和内部结构。
Under the action of gravity, the cross sectional distribution of sediment in the conveying pipelines shows that the sediment in the upper part of the pipelines is thin while the sediment in the lower part is dense and thick. As a result, the whole flow can be reduced to two levels of flow with different mean velocity and mean concentra tion. Taking the measured flow of medium sand in Ф150 mm pipelines as an example, the location of the interface between the two levels of flow is determined with the iteration method. The results show that the two-level flow model can depict the major features and internal structure of sediment flow in the pipelines.
出处
《中国港湾建设》
北大核心
2008年第1期13-15,共3页
China Harbour Engineering
基金
国家自然科学基金资助项目(No:50679016)
关键词
管道输沙
流动特性
两层流动模型
分界面位置
sediment transport in pipeline
flow characteristics
two level flow model
location of interface
作者简介
倪福生（1961-），男，博士，教授。主要从事疏浚技术研究。
