中文摘要：

由没有对齐的指南翼(MGV ) 的一个模型泵汽轮机 S 曲线特征和它的改进的试验性的研究被扩大通过 3-D 为泵汽轮机建原型短暂流动模拟。与 SST 骚乱模型一起的不稳定的平均 Reynolds 的海军司烧方程被用来在汽轮机模型启动期间有或没有没有对齐的指南翼在一台可逆泵汽轮机的全部流动经过以内为短暂流动建模。由使用没有对齐的指南翼的不稳定的 S 曲线和它的改进被模型测试和模拟验证。短暂流动计算被用来在全部流动经过澄清压力脉搏和内部流动行为的变化。没有对齐的指南翼的使用能消除一台泵汽轮机的 S 曲线特征，并且能显著地在全部流动经过和跑步者增加压力脉搏振幅光线的力量在启动期间。MGV 仅仅减少了指南翼吸方面上的脉搏振幅旋转速度什么时候是不到 50% ，评价速度。水力的原因是 MGV 戏剧性地在全部流动经过内改变了流动模式，并且在领队翼和跑步者内破坏流动分发的对称。

英文摘要：

Experimental studies of a model pump-turbine S-curve characteristics and its improvement by misaligned guide vanes （MGV） were extended to prototype pump turbine through 3-D transient flow simulations. The unsteady Reynolds-averaged Navier-Stokes equations with the SST turbulence model were used to model the transient flow within the entire flow passage of a reversible pump-turbine with and without misaligned guide vanes during turbine model start-up. The unstable S-curve and its improvement by using misaligned guide vane were verified by model test and simulation. The transient flow calculations were used to clarify the variations of pressure pulse and internal flow behavior in the entire flow passage. The use of misaligned guide vanes can eliminate the S-curve characteristics of a pump-turbine, and can significantly increase the pressure pulse amplitude in the entire flow passage and the runner radial forces during start-up. The MGV only decreased the pulse amplitude on the guide vane suction side when the rotating speed was less than 50% rated speed. The hydraulic reason is that the MGV dramatically changed the flow patterns inside the entire flow passage, and destroyed the symmetry of the flow distribution inside the guide vane and runner.