空间淹没水跃流态特征数值计算  

Flow Pattern Numerical Simulation on Spatial Submerged Hydraulic Jump

作　　者：范晏岗[1] 

机构地区：[1]新疆额尔齐斯河流域开发工程建设管理局,新疆乌鲁木齐830000

出　　处：《水电能源科学》2016年第7期92-94,111,共4页Water Resources and Power

基　　金：国家自然科学基金项目(51309256)

摘　　要：空间水跃可使局部范围内水流紊动剧烈,提高水流稳定性和消能效率,消能效果较好。为探讨空间水跃的流态特性,基于RNGκ-ε紊流模型和流体体积函数(VOF)自由表面处理方法,建立了三维紊流数学模型,数值模拟了突扩比为0.833、0.667、0.500、0.333等4种空间水跃情况,讨论了不同突扩比下空间淹没水跃的流态及漩涡演变规律。结果表明,空间水跃下游流态存在左右摆动、主流轴线聚集等现象,当突扩比小于一定值后,在水跃发展过程中将产生游离的立轴漩涡。研究成果为空间水跃在水利工程中的应用提供了理论依据和参考。Since the spatial hydraulic jump can enlarge turbulence intensity in a local range of water flow,it could improve the stability and energy dissipation.In order to study the characteristics of flow pattern,spatial submerged hydraulic jumps with the abrupt expansion ratios of 0.833,0.667,0.500 and 0.333 are simulated numerically based on a non-uniform structured mesh,the RNGκ-εturbulence model and VOF method.Based on the analysis of flow pattern and vortex,it was found that there are swing and aggregation phenomena in the downstream;when the expansion ratio less than a certain value,free vertical vortex appeared during the development of hydraulic jump.The research can provide theoretical basis and reference for application of spatial hydraulic jump in hydraulic engineering.

关 键 词：空间水跃 突扩比 典型水跃 流态 数值计算 

分 类 号：TV133[水利工程—水力学及河流动力学]