设置连通孔对差动式调压室压差和涌浪的影响

对于长引水式水电站常用的差动式调压室,分析了其兼作升管的闸门井和大井之间的胸墙在不同高程上布置的面积合理的连通孔,对调压室的差动性能和压差的影响,并结合实际算例进行涌浪分析.结果表明,在保证了调压室的差动性能、涌浪幅度和衰减速度的同时,在胸墙上设置位置和尺寸合理的连通孔,可以有效降低胸墙结构承受的压差,由超过30 m的较大压差降低至20 m以下,保证调压室的安全稳定运行,且有利于闸门的控制.因此,设置连通孔的差动式调压室是合理可行的.

Differential pressure and surge analysis of differential surge tank with interconnecting holes

Based on the differential surge tank commonly used in long-distance diversion hydropower stations,in which interconnecting holes with rational cross sectional area were arranged at different elevations of breast wall between outer chamber and gate shaft used as a riser,a study was made on the influences of interconnecting holes on the differential performance and differential pressure of the surge tank,and further surge analysis was performed through a case study.The result shows that,with less effect on differential performance,surge amplitude,and decay rate of the surge tank,the arrangement of interconnecting holes at rational positions with proper sizes can effectively decrease the differential pressure on breast wall(from over 30?m down to 20?m below) and ensure the safe operation of the surge tank,and it is beneficial to gate control.Therefore,the differential surge tank with interconnecting holes arranged is rational and feasible.