泄洪竖井内消能掺气技术研究进展

Research Progress on Energy Dissipation and Aeration Technology in Flood Discharge Shaft

该文通过总结泄洪洞竖井段消能掺气技术的布置型式、消能机理、消能率和通气特性等研究进展,结合公伯峡水平旋流泄洪洞竖井段环形掺气坎的研究,提出了对竖井段消能掺气技术的一些思考。大量的工程实践表明,竖井消能工是一种高效的内消能工,不同的运行水头与泄流量可以有不同的布置方式。因而,在泄洪洞进口段提前消杀水流能量并形成分段消能效果,可大大减小高水头泄洪洞总体消能压力、减轻后续流动中各种高速水流问题,这也是目前解决高水头泄水建筑物中高速水流问题的一种趋势。

Based on the summary of the research progress in the layout,energy dissipation mechanism,energy dissipation rate and ventilation characteristics of the energy dissipation and aeration technology in the shaft section of the flood discharge tunnel,and combined with the research on the annular aeration bucket in the shaft section of the horizontal swirling flood discharge tunnel in Gongboxia,some thoughts on the energy dissipation and aeration technology in the shaft section are put forward.A large number of engineering practices show that the flood discharge shaft is a kind of efficient internal energy dissipater,which can be arranged in different ways for different running head and discharge flow.Therefore,the energy of water flow in the inlet section of the spillway tunnel is eliminated in advance,and the effect of segmented energy dissipation is formed.Meanwhile,the overall energy dissipation pressure of the high-head spillway tunnel and various high-speed water flow problems in subsequent flows are reduced.It is also a trend to solve the high-speed water flow problems in high-head spillway structures at present.