万家寨水电站水中含沙对空化压力的影响

对万家寨水电站含沙量对水力机械内空化压力的影响进行了研究，并利用自行研制的测量装置实测了黄河万家寨水电站含沙水样的初生空化与，临界空化压力．实测结果表明，随着含沙量的增大，初生空化与临界空化压力值均有所提高，且接近线性关系．这一成果可用于所有含沙河流上的水电站水轮机与水泵站水泵合理确定安装高程时的参考．这样做可以减少空蚀与泥沙磨损给运行带来的经济损失．

Effect of sediment-laden flow on cavitation pressure inside of hydraulic machineries in Wanjiazhai Hydropower Station

The effect of the sediment-laden flow on the cavitation pressure inside of the hydraulic machineries in Wanjiazhai Hydropower Station is studied herein, and then the initial cavitation pressure and the critical cavitation pressure in the water passages of the hydraulic machineries concerned are measured with water samples from the sediment-laden flow at Wanjiazhai Hydropower Station by a self-developed measuring device; of which the results show that both the initial cavitation pressure and the critical cavitation pressure are to be increased along with the increase of the sediment content, which is to approach a linear relationship approximately. It is demonstrated that the result of the study can be used as a reference to the determination of the erection elevations for both the hydraulic turbines in the hydropower station and the pumps in the pumping station on the rivers with sediment-laden flow. In this way the economic loss from the operations caused by the cavitation erosion and the sediment wearing can be decreased.