摘要
通过建立表孔溢洪道水工模型试验,在不同的水位下对模型进行观测,试验结果显示:将渐变段从20m增加到40m,流态在设计水位时,水流流态平顺,在校核水位时,水翅强度明显变弱;溢流堰段和抛物线段沿程水面线和压强分布正常,局部存在一定负压。通过对空化数计算得出:在设计水位1 305.00m时,沿程空化数最小,且不会发生空化空蚀破坏。
Through the establishment of table hole spillway hydraulic model tests,we observed the model under different water levels,experimental results show that： we increased the gradual change section from 20 m to40m,when the water level was in the design of flow pattern,the flow regime is smooth,when the water level was in the check water level,water-wing strength was significantly weaken;Flow profile and pressure along the water of weir section and parabolic segment was distribute normaly,there was a negative pressure.We calculated the cavitation number and conclude：when the design water level was 1305.00 m,cavitation number along the way was the least,and the damage of cavitation and cavitation erosion would not occur.
出处
《吉林水利》
2017年第3期28-30,共3页
Jilin Water Resources
关键词
模型试验
收缩角
压强分布
空化数
model test
contract Angle
pressure distribution
cavitation number
