掺气窄缝戽流消能的研究

通过水工模型试验得出，在消能戽斗内设置掺气窄缝墩，调节水流结构，形成掺气窄缝戽流，对低堰消能是很有利的，并进而得出计算公式。试验结果表明掺气窄缝戽流具有消能效果显著，下淤冲刷深度与没有窄缝墩的戽斗消能相比，可减少冲恻深度６０％以上，可减少尾水的波度高度和长度１．２倍，降低下游的界限水深等优点，并适合在砂质软基河流上应用。

The Research on the Energy Dissipator With Aerated Narrow Crack Roller Buckets

The aerated narrow crack pier were set up in the energy dissipator miler bucker through hydraulic model test. Adjusting the flow structure was to form the aerated narrow crack pier flow, which was benefit to the low spillway energy dssipator, and the an calculating equation was obltained.The results showeel that the aerated narrow crack pier roller buckets flow had the obvious dissipator effect. Compared with the energy dissipator with aerated narrow crack roller buckets, the erosion depth downstream could be reduced more than 60%, the solpe, height and length of tailwater could be lessened 120%, and the criti cal depth of flow downstream also could be decreased. This result was adapted to used on the sandy soft basis.