摘要
本文在分析水槽模型试验结果的基础上，简要论述了盲肠式河段口门紊动掺混区的水流紊动和泥沙扩散特性．近似认为掺混区的泥沙运动具有相似性，给出了含沙量分布的相似函数．对掺混区的泥沙扩散进行了模拟计算，并分析了掺混区的含沙量变化梯度．在此基础上，建立了盲肠回流淤积率估算公式．
Based on experimental results from a flume,a systematical study on the properties of sediment diffusion in turbulent mixing region at the mouth of cecum reach was made.The experimental data show that the sediment movements have similar structure at the turbulent mixing region.From the theory of similarity,a similarity function of sediment concentration was obtained.The sediment diffusion was simulated by numerical calculation,and the gradient of sediment concentration was analysed. Finally,a formula to estimate the sediment deposition rate caused by circulating flow was also established.
出处
《泥沙研究》
CSCD
北大核心
1995年第2期11-21,共11页
Journal of Sediment Research
关键词
紊动掺混区
泥沙扩散
相似结构
河口泥沙
turbulent mixing region
sediment diffusion
similarity structure.
