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为提高水能资源的利用率,实现水资源的优化配置,跨流域多水源引水式水电开发在我国逐渐得到运用.但设计中发现有可能存在倒流与高水源被抽空的问题.针对该问题,运用恒定流理论,建立多水源引水式水电站管道系统的数学模型,在无量纲处理的基础上,推导引水主洞与引水副洞的流量计算公式及流量分配控制条件,并对影响流量分配的各种因素进行敏感性分析.其结论是:引水副洞水头损失系数是主导因素,增大该系数可消除倒流现象,进而使主、副洞流量分配达到合理范围,具体工程中可以通过减小副洞断面尺寸、增大副洞糙率及局部损失等措施来实现.
In order to improve the utilization rate of hydropower resources and optimize the allocation of water resources, multi-water diversion hydropower development across the basin has been gradually applied in our country.But the design may find that there is a problem of backflow and high water source being emptied.In response to this problem, Based on the theory of constant flow theory, the mathematical model of pipeline system of multi-water diversion hydropower station is established. On the basis of dimensionless treatment, the flow calculation formula and flow distribution control conditions of main diversion tunnel and diversion channel are deduced. The conclusion is: the water head loss coefficient of the water diversion is the dominant factor, increasing the coefficient can eliminate the backflow phenomenon, so that the main and auxiliary hole flow distribution to a reasonable range, the specific project can reduce the vice Hole section size, increase the hole roughness and local loss measures to achieve.