W型迷宫堰过流能力试验研究

Experimental Study on Flow Capacity of W Type Labyrinth Weir

受制于现有迷宫堰流量计算公式的适用条件,针对山区峡谷形水库,采用模型试验,研究不同单宫角度的W型迷宫堰过流能力,并和相同布置形式的WES实用堰进行对比分析,得出W型迷宫堰的过流能力和过堰水流流态密切相关:迷宫堰过流能力增大仅限于水流流态从薄壁堰流过渡到实用堰流的小流量范围,当流量进一步增大时,水流流态过度到完全的实用堰流,但受过堰水流压力变化影响,其过流能力低于WES实用堰。试验研究成果可为类似工程提供参考。

Subject to the conditions of the existing flow formula on labyrinth weir, this paper adopts the comparative study, and draws a conclusion that the flow capacity of the labyrinth weir in type W is closely related to flow regime of weir： the increase of the flow capacity of the labyrinth weir, is closely limited to the flow regime transition from thin plate weir flow to practical weir flow, and when the discharge further increases, the flow pattern is over to the complete practical weir flow, but the flow capacity of the weir is less than WES practical weir. The experimental results can provide reference for similar projects.