摘要
导流洞改建为龙抬头式泄洪洞是一种常见的改建形式,其局部水流流态十分复杂。研究一种高水头龙抬头式明流泄洪洞,采用RNG k~ε模型和标准壁面函数模拟紊流,利用几何重构的VOF模型追踪自由水面;对某龙抬头式泄洪洞在设计洪水位闸门全开情况下进行了三维流场数值模拟。将沿程水面高程、底板压力及掺气空腔长度的计算结果与模型试验数据进行对比验证,两者吻合良好,从而为工程设计提供参考。
Transforming diversion tunnel to spillway tunnel is common in engineering. A kind of ogee spill way tunnel is studied in this paper,in which the flow field is very complicated. Through simulating turbulence through RNG k ~ ε model and standard wall functions and tracking the free surface through GEO-construct method of VOF model,a 3d flow field numerical simulation for a tunnel spillway was developed under the design flood level. The results of the water surface,bottom pressure and lengths of aeration cavity were compared and analyzed with the model test data which were in good agreement. So the solution data can be used for engineering design.
出处
《水利与建筑工程学报》
2017年第3期31-34,39,共5页
Journal of Water Resources and Architectural Engineering
基金
国家自然科学基金项目(51479022
51179021)
关键词
高水头
自由水面
泄洪洞
数值模拟
high water head
free surface
tunnel spillway
numerical simulation
