摘要
基于促淤浮帘的参数设计和稳定性考虑,需探明浮帘的绕流阻力特性及其计算方法。通过试验研究,分析了绕流阻力随浮帘密度、高度和弗汝德数3个参数的变化规律,得到了在河床未发生冲刷时绕流阻力最大且随浮帘趾冲刷及帘后淤积的发展逐步减小的结论。根据试验数据,利用回归分析得到浮帘绕流阻力系数的计算表达式。试验结果表明,在所研究的范围内,浮帘绕流阻力系数与浮帘雷诺数无关。
Under the consideration of the parameter design and stability of the suspended flexible curtain （SFC）for sedimentation enhancement, the characteristics of the drag force of the SFC and its calculation method have to be figured out. Through the relevant experimental study, the law of the variation of the drag force along with the three parameters, i.e. density and height of SFC and Froude numbers, is analyzed herein. It is concluded that the drag force is maximum when river-bed is not eroded, and then gradually decreases along with the development of the erosion at the toe of SFC and the sedimentation behind it. Based on the data from the experiment, the formula for the calculation of the drag force coefficient of SFC is obtained through the relevant regression analysis. The result shows that the drag coefficient of SFC is not dependent on the Reynolds number of it.
出处
《水利水电技术》
CSCD
北大核心
2013年第6期130-134,共5页
Water Resources and Hydropower Engineering
基金
国家自然科学基金"浮帘促淤系统安装设计参数与施工工艺的研究"(51179101)
关键词
促淤浮帘
绕流阻力
浮帘雷诺数
suspended flexible curtain for sedimentation enhancement
drag force
Reynolds number of SFC
作者简介
斯锋（1988-），男，硕士研究生。
