巴贡水电站溢洪道掺气减蚀试验研究

Tests and research on aeration and corrosion reduction for spillway of Bakun hydropower station

结合马来西亚巴贡水电站掺气减蚀试验研究,对巴贡水电站溢洪道掺气设施的位置、掺气设施的间距、原型通气量的估算等问题进行了分析总结,并提出了一种新的掺气槽体型。这种体型通过在掺气槽与原底板之间采用抛物线连接,使下游底板局部体型与挑射水流下缘形状接近,从而使掺气坎挑射水流与底板的夹角变小,消除了挑射水流产生的回水,较好地解决了掺气槽气腔积水问题,可供其它工程参考。

Based on tests and research on aeration and corrosion reduction for Bakun hydropower station, analysis is made for the location and space of aeration facilities, the estimation of ventilation amount of the prototype, and a new type of aeration slot is put forward. Through connection of the aeration slot with the original invert by a parabola, and making the local shape of the downstream invert similar to the shape of the lower edge of the trajectory flow, the angle included between the aeration sill trajectory flow and the invert becomes small, and the backwater caused by trajectory flow is eliminated, therefore the problem of water - logging in air cavity of aeration slot is well solved, providing reference for other projects.