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为研究洞内曲线阶梯连接段水流的流场特性,采用水气两相流Mixture模型,结合Realizableκ-ε紊流模型计算分析了连接段流态和流场分布规律。结果表明,阶梯连接段计算水面线和消能率与试验结果吻合;连接段进口由于突扩了1.0m,局部出现水翅现象,水翅高度和范围较小;阶梯连接段滑行水流分为阶梯漩涡区和平行虚拟底板主流区二部分,斜面阶梯与水平阶梯上的漩涡位置不同,漩涡区水流存在横向流动,流速较小,可见该方法能很好地模拟曲线阶梯连接段的流场特性,为同类水工体型流场特性研究提供了参考。
In order to study the characteristics of flow field in curved connecting section of tunnel, the flow and flow field distribution in connecting section were calculated and analyzed by using Mixture model of water-gas two-phase flow and Realizable κ-turbulence model. The results show that the calculated water surface line and energy dissipation rate are in good agreement with the experimental results. The water inlet and outlet of the connecting section are slightly enlarged due to sudden expansion of 1.0m, In the two sections of the mainstream and the main floor of the parallel virtual floor, the swirling positions of the inclined step and the horizontal step are different. The water flow in the swirling area has lateral flow and the flow velocity is small. It can be seen that this method can well simulate the flow field characteristics of the curved ladder connecting section, This paper provides a reference for the research on flow field characteristics of similar hydraulic body.