中文摘要：

为了研究不同因素对弧底梯形渠道无喉道量水槽水力性能的影响,基于Fluent6.3大型流体计算软件,采用RNGk-ε湍流模型和VOF方法相耦合,对弧底梯形渠道无喉道量水槽进行了三维数值模拟,并将模拟流量与渠道流量进行对比分析,结果表明二者吻合度较好,该数值模拟方法有效可靠。在确定模拟准确性的前提下,分析了该量水设施在不同喉口收缩比和底坡下的水位流量关系,上游断面弗劳德数,壅水高度,水头损失等水力特性,为量水槽的进一步研究及其优化推广提供了新思路。

英文摘要：

To study different factors affecting hydraulic performance of arc-based trapezoidal canal and cut-throat flow measurement flume,this paper makes a comprehensive experimental study of water-measuring based on RNGk-εturbulence model and VOF approach to the free surface by fluent6.3.Comparing the channel flow and the simulation flow,the results show that the above data coincide well and therefore numerical simulation is effective and reliable.In determining the premise simulation accuracy,this paper analyzes the hydraulic performance on the relationship between upstream water level and discharge,the upstream Froude number,backwater height,and head loss of arc-based trapezoidal canal and cut-throat flow measurement flume with different throat contraction ratios and channel slopes.The study serves as a reference to further research and optimization promotion of the measuring flume.