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长渡槽内水位变化、流速流态等水力特性是工程设计部门甚为关注的问题.南水北调中线一期工程总干渠长约10km的沙河渡槽长宽比大、过水建筑物多等,单独采用物理模型试验进行研究不太经济,单独采用二维甚至三维数学模型进行计算也存在模型参数难以确定的困难,采用复合模拟方法经济有效地解决了以上难题.在设计流量与加大流量的条件下进行计算,得到如下主要成果:沙河渡槽内3个弯道中,鲁山坡落地槽弯道段的横向水面差最大,设计和加大流量工况下分别达0.056m和0.066m;沙河渡槽内水流衔接良好,流态平稳.
Longitudinal aqueduct water level changes, the flow velocity and other hydraulic characteristics of the engineering design department is very concerned about the problem.China South-to-North Water Diversion Project Phase 1 main canal about 10km Shahe aqueduct length-width ratio, water structures and more, using a separate physical It is not economical to carry out the model test, and it is hard to determine the parameters of the model by using the two-dimensional or even three-dimensional mathematical model alone. The complex simulation method is adopted to solve the above problems economically and effectively. Under the condition of designing the flow rate and increasing the flow rate The main results are as follows: Of the three bends in the Shahe aqueduct, the horizontal difference of surface water level at the slope of the Lushan slope is the largest, 0.056m and 0.066m respectively at the designed and increased flow rate; , Steady flow.