【摘要】 本文通过理论推导,数值计算和工程实例,分析了下游流量水位边界条件对过渡过程的影响。结果表明对于设置尾水调压室的电站,流量水位边界条件减小大波动过程中调压室涌浪值,对其他调保参数极值由于调压室的缓冲作用影响很小。考虑流量水位边界条件时减小调压室的稳定面积,提高小波动调节品质,按恒定水位的边界条件计算是安全的。而对于没有设置尾水调压室的水电站,尾水位的波动直接影响尾水管进口压力值,使该值减小,按恒定水位计算是偏于危险的。更多还原

【Abstract】 By theoretical analysis, numerical calculation and engineering example, it is proved that stage-discharge relation of downriver decrease surge-chamber ground swell, and makes little difference to other guaranteed regulations because of buffer action of surge-chamber. Boundary condition of constant water level is safe because stage-discharge relation reduces stable sectional area of tailrace surge tank, and improves governing quality. But which is unsafe in power station without tail surge tank because fluctuation of tail water directly influence pressure in the draft tube and make it worse.更多还原