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为了解水泵水轮机反水泵工况的水力性能,以某抽蓄电站为例构建了水力模型,采用SSTκ-ω模型和Presto差分格式模拟反水泵工况的内流场和外特性,并结合试验数据进行对比验证。结果表明,反水泵工况的扬程与流量关系曲线及特性曲线均呈抛物线分布;活动导叶开度越大,进入反水泵的转速越高,流量越大;反水泵工况存在大量的回流涡结构,反水泵的能量损失主要集中于活动导叶的入口和出口处;转轮内存在的脱流现象主要分布在叶片吸力面进口处和压力面出口处;流量越低,转轮流道大尺度涡结构越多,乃至充满整个流道。该结论为水泵水轮机“S”特性的研究提供了依据。
In order to understand the hydraulic performance of the pump turbine reverse water pump, the hydraulic model was constructed by taking a pumping station as an example. The SSTκ-ω model and the Presto difference scheme were used to simulate the internal flow field and external characteristics of the reverse water pump. Combined with the experimental data Contrast verification. The results show that the relation curve and the characteristic curve of the lift and flow of the reverse water pump are parabolic. The larger the opening of the movable guide vane is, the higher the speed of the reverse water pump is, the larger the flow rate is. The energy loss of the structure and the anti-water pump is mainly concentrated at the entrance and exit of the movable guide vane. The phenomenon of the shedding existing in the runner is mainly distributed at the inlet of the suction side of the blade and the exit of the pressure surface. The lower the flow rate, Vortex structure more, and even filled the entire runner. This conclusion provides the basis for the research of pump “S ” characteristics.