摘要
采用复合模型技术,以南水北调中线穿七里河倒虹吸工程为例,研究了旁侧入流对绕体流动特性与河床冲淤变形的影响。研究成果表明:工程实施后,如无旁侧入流,裹头上游水位将有所壅高,流速略有降低,工程断面流速有所增加;增加旁侧入流后,受旁侧入流顶托作用,裹头上游的水位壅高值将显著增加,工程附近局部区域内流速也将发生较大的变化。同时考虑旁侧入流与来流非恒定效应的冲刷试验成果表明:裹头附近的河床冲刷深度在涨水期持续增加,并在洪峰时刻附近达到最大值,但在退水期则略有回淤,相对回淤高度与洪水峰型系数有关,峰型系数越大,相对回淤高度也越大。
In this paper,the hybrid model was adopted to analyze the influence of lateral inflow on main flow characteristics and river bed deformation based on the river flow around the inverted siphon which will be built in South-to-North Water Transfer Project in the Qili River.The simulation results show that,after the construction of the project,if a lateral inflow doesn't exist,the water level in the upstream of wrapping will be raised and the velocity in the same position will be slightly decreased while that n...
出处
《水利学报》
EI
CSCD
北大核心
2009年第11期1381-1385,共5页
Journal of Hydraulic Engineering
关键词
旁侧入流
绕体流动
复合模型
峰型系数
河床冲深
lateral inflow
circumfluence
hybrid model
coefficient of flood wave type
depth of river bed scouring
