| 王廷,沈振中.一种模拟面板砂砾石坝漫顶溃决的动床耦合分析模型[J].水利学报,2015,46(6):699-706,713 |
| 一种模拟面板砂砾石坝漫顶溃决的动床耦合分析模型 |
| Mathematical model of overtopping-induced break of concrete-faced sand-gravel dams |
| 投稿时间：2014-03-09 |
| DOI：10.13243/j.cnki.slxb.20140265 |
| 中文关键词: 面板砂砾石坝 漫顶溃决 动床 耦合 固液两相湍流模型 泥沙启动 |
| 英文关键词: concrete-faced sandy gravel dam overtopping-induced dam break erodible bed coupled model solid-liquid two-phase turbulent flow model sediment incipience |
| 基金项目:水利工程病变机理与健康诊断(2009586012) |
|
| 摘要点击次数: 1910 |
| 全文下载次数: 43 |
| 中文摘要: |
| 在分析面板砂砾石坝漫顶溃决特点的基础上,建立了一种模拟面板砂砾石坝漫顶溃决过程的动床耦合分析模型。该模型采用了固液两相湍流数学模型,通过流体体积法(VOF)进行自由表面的追踪,可准确模拟水流运动。其中的泥沙启动模块考虑了漩涡水流的剪应力、底沙表面的法向向量以及泥沙水下休止角等因素的影响。求解方面采用了较为成熟的结构网格和控制体积法。水槽试验和数学模型计算验证表明,该模型能够细致、准确地模拟面板砂砾石坝溃决的整个过程,清晰刻画陡坎式漩涡水流向内淘刷的侵蚀方式,还能合理地反映面板、水流与床面变形三者之间相互作用的复杂关系,可为进一步深入研究面板砂砾石坝溃坝机理提供有利工具。 |
| 英文摘要: |
| Based on analysis of features of concrete-faced sand-gravel dam break, this study has established a coupled model of erodible bed. With the solid-liquid two-phase turbulent flow, this model tracks the free face with VOF,simulating very accurately the flow movement. As for the sediment incipience module, shear stress of swirling flow, sediment surface normal and angle of repose are taken into consideration. For computation, the relatively matured structure grid method and control volume method are employed. The flume experiment validates the model,proving that the model can simulate meticulously and accurately the entire breaking process of concrete-faced sandy gravel dams, clearly portray in-ward scouring of scarped swirling flow and reflect the complicated relationship among concrete face,flow and bed deformation. Thus it provides an effective tool for further study on the mechanism of break of concrete-faced sand-gravel dams. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|