某水库台阶式溢洪道掺气坎优化试验研究

A Reservoir Stepped Spillway Aeration Optimization Experiment Research

台阶式溢洪道消能效果与其台阶段泄槽掺气浓度密切相关,通过调整掺气坎体型以达到使台阶段泄槽充分掺气,消能率增大。试验研究发现,与原方案台阶段消能率相比较,除设计水位工况消能率有所下降外(小了4.74%),校核水位工况和校核流量工况的消能率分别提高了6.18%和6.64%。设计水位工况消能率减小可能与推荐方案台阶个数减少有关,而校核水位工况消能率增大则说明台阶段的掺气有利于消能。

Stepped spillway energy dissipation effect and its phase is closely related to the discharge air concentration,the article by adjusting the aeration candy shape to make stage sufficient aeration in the discharge,the energy dissipation. Experimental study found that compared with the original plan stage of energy dissipation, except a drop in energy dissipation design water level conditions( 4. 74%),check the water level condition and checking the flow conditions of the dissipation increased by 6. 18% and 6. 64%,respectively. Energy dissipation design water level conditions reduce may be related to the number of recommended steps to reduce,increase the dissipation and check water level conditions shows stage aeration is advantageous to the energy dissipation.