泄洪洞进口压力段体型的试验分析

Exprimental Analysis on Body Form for Inlet Pressure Part of Spillway Tunnel

通过对深孔无压泄洪洞“龙抬头”式压力进口段的模型实验，经方案比较并对实测数 据进行分析，提出了可减少负压、增大泄流能力的较合理的体型设计曲线。同时采用加压板消除明流洞段冲击波、提高进口压力值，实测效果亦较明显。

In this paper, the authors put forward a more reasonable curve of body form design which has the function of decreasing negative pressure and increasing the capacity of outflow by carring out the model experiment for 'drag- on's raising head' type inlet pressure part of deepwater free level spillway tunnel as well as by carrying out plan comparison and analysis of actual measurement data.At the same time,using increased pressure board can eliminate the shock wave in the open flow tunnel and increase the pressure value at the inlet.The result is obvious.