水流掺气分期导流工程全流场三维数值模拟分析  

Three-dimensional Numerical Simulation Analysis of Flow Field in Stage Diversion Engineering with Aeration

作　　者：肖宏山 XIAO Hong-shan(Water and Immigration Service Center,Benxi Manchu Autonomous County,Benxi,117100,China)

机构地区：[1]本溪满族自治县水务和移民事务服务中心

出　　处：《黑龙江水利科技》2019年第11期10-15,共6页Heilongjiang Hydraulic Science and Technology

摘　　要：文章综合漂移通量模型、卷气模型和紊流模型,三维数值模拟了某实际导流工程下泄水流局部掺气的影响。针对复杂地形条件的导流工程采用CATIA软件建立三维几何模型。然后对溢洪道水流局部掺气条件下的导流工程整体流场利用Tru VOF水流自由表面追踪法、卷气模块及RNG k-ε紊流模型进行了计算,从而揭示了水力参数压强、水位和流态的分布规律,通过对比分析数值模拟结果和物理模型试验验证了模型的可靠性。研究表明:数值模拟能够较为准确的计算上游围堰设计高程,在导流工程流场计算中具有较强的科学性和有效性;在三维流场中引入卷气模块较好的揭示了掺气范围、水流掺气浓度、压强及流速分布特征,可为其他类似工程的计算模拟提供一定参考价值。This paper synthesizes drift flux model,entrainment model and turbulence model to simulate the effect of local aeration on a practical diversion project.Aiming at Diversion Engineering with complex terrain conditions,three-dimensional geometric model is established by CATIA software.Then the whole flow field of the diversion project under the condition of partial aeration of spillway flow is calculated by using Tru VOF free surface tracing method,entrainment module and RNG k-e turbulence model,thus revealing the distribution law of hydraulic parameters such as pressure,water level and flow pattern.The numerical simulation results and physical model experiment are compared and analyzed.The reliability of the model is verified.The results show that the numerical simulation can accurately calculate the design elevation of the upstream cofferdam,and has a strong scientific and effective effect in the flow field calculation of diversion engineering;the introduction of entrainment module in the three-dimensional flow field can better reveal the characteristics of aeration range,flow aeration concentration,pressure and velocity distribution,which can be used for other similar projects.The computational simulation provides some reference value.

关 键 词：三维数值模拟 分期导流 水流掺气 分布规律 

分 类 号：TV551.1[水利工程—水利水电工程]