导流洞改建尾水洞明满流过渡过程数值模拟  

Numerical Simulation of Free Surface-Pressurized Flow in Tailrace Tunnel Transformed from Diversion Tunnel

作　　者：张宗溥[1] 花玉龙[1] 程欢[1] 

机构地区：[1]河海大学水利水电学院,江苏南京210098

出　　处：《人民黄河》2015年第4期105-108,共4页Yellow River

摘　　要：针对导流洞区别于常规尾水洞的水力特性,在分析总结明满流数学计算方法的基础上,采用狭缝法的特征隐式格式法建立模型,对尾水洞中明满流过渡过程进行数值模拟。结合工程实例,采集过渡过程中监测点的压力和水位极值,并利用该电站引水发电系统整体水工模型试验进行验证。对比分析得到数值计算结果与模型试验结果一致,表明该数学模型适用于导流洞改建发电尾水洞明满流过渡过程的数值模拟。The characteristics of the diversion tunnel are distinguished from the conventional tailrace tunnel and the hydraulic phenomenons during the transition between the free surface and pressure flow in the tailrace tunnel rebuilt from diversion tunnel are much more complicat-ed,which include trapped air bubbles,air exhaust and suction. A numerical model was established to simulate the free surface-pressurized flow by using the slit method and the characteristic implicit method. Combining with a project example,the model was programmed and the comparison of results of the numerical calculation and the model tests show that the model is suitable for the kind of cases.

关 键 词：导流洞 明满流 数值模拟 特征隐式格式法 模型试验 

分 类 号：TV134.3[水利工程—水力学及河流动力学]