巴拉水电站溢洪洞掺气坎体型优化试验研究

Experimental study on shape optimization of spillway tunnel aerator of Bala Hydropower Station

针对巴拉水电站溢洪洞陡坡段掺气状况不佳的情况,本文主要对前两级掺气坎体型进行优化调整,通过在常规掺气坎下游增设局部陡坡,将绝大部分回水控制在局部陡坡下游侧,从而保证掺气坎后空腔的稳定通气和陡坡段的掺气需求,为工程的安全运行提供了保障。

Focusing on the poor condition of the aerator in the steep slope section of the spillway tunnel in Bala hydropower station,this article mainly discusses the shape optimization and adjustment of the first two aerators.By adding a local steep slope downstream of the conventional aerator,most of the backwater is controlled on the downstream side of the local steep slope,ensuring the stable ventilation of the cavity behind the aerator and the aeration demand of the steep slope section.This would provide a guarantee for the safe operation of the project.