【摘要】 为了研究尾水系统拓扑结构复杂的大型水电站尾水隧洞内可能出现的明满交替流动对电站水力瞬变过程的影响,采用特征隐式格式法计算明满交替流动,并根据该方法的特点建立了明满流特征隐格式矩阵方程自生成系统,实现了电站中各种布置方式尾水隧洞内明满交替流动的自适应计算。将该方法应用于电站的瞬变计算,分析了下游反射界面位置的设定对计算结果的影响,并得到了尾水隧洞中发生明满交替流动时出现最大压力的位置及相应的下游水位。更多还原

【Abstract】 Transient mixed free-surface-pressure flows occur in tailrace tunnels of many hydropower stations with complex topological structures. The Characteristic Implicit Method was used to compute the mixed free-surface-pressure flow. The characteristic implicit scheme equation predicts the shape of the mixed free-surface-pressure flow for all kinds of tunnel network topologies. The program was used to successfally predict the tranient flow fields in hydropower stations, including the effect of downstream reflection interfaces and to calculate the position of the maximum pressure in the mixed free-surface-pressure flows in tailraces.更多还原