百色水电站尾水隧洞明满交替流动计算研究  

Research on Transient Calculation of Mixed Free-surface-pressure Flow in the Tailrace Tunnel of Baise Hydropower Station

作　　者：唐新发[1] 陆锡赋[1] 樊红刚[2] 陈乃祥[2] 黄健兵[2] 

机构地区：[1]广西水利电力勘测设计研究院,广西南宁530023 [2]清华大学,北京100084

出　　处：《红水河》2006年第1期33-37,共5页Hongshui River

摘　　要：百色水电站运行时,尾水隧洞中有可能出现明满交替流动而使尾水系统对电站运行的稳定性和过渡过程都带来复杂的影响,因此建立合理可行的明满交替流动数值模型是完全必要的。针对现有明满交替流动的数值解法中存在稳定性差的缺点,提出了一种新的计算方法——特征隐式格式法,其主要思路是将动量方程和连续方程转化为双曲型方程组的标准形式进行差分,并通过尾水隧洞水工水力学模型试验专门对该方法进行验证,表明该计算方法是正确的。将该方法应用于百色水电站的尾水系统动态仿真计算中,并对尾水隧洞洞型进行优化,得到了满意的结果。In tailrace tunnels of Baise Hydropower Station, a transient mixed free-surface-pressure flow may occur, which has a complex effect on the stability and transient of the power plant, so it is needed to build a reasonable and feasible mixed flee-surface-pressure flow numerical model. In this paper, several methods used for computing the mixed free-surface-pressure flow are compared and analyzed. Based on implicit finite difference scheme, a new method （Characteristic Implicit Format Method） with good stability has been offered. Compared with other methods, the new method solves the problem of the stability. The normal forms of the hyperbolic system made up of the continuity and momentum equations are used and differenced. The calculation results of this scheme agree with the tailrace tunnel hydraulic modeling test very well. The method is adopted in the tailrace system dynamic simulation calculation of Baise hydropower station, and the tailrace tunnel shape is optimized, so the satisfying result is worked out.

关 键 词：尾水隧洞 明满交替流动 特征隐式格式法 百色水电站 

分 类 号：TV134.304[水利工程—水力学及河流动力学]