丁坝对弯道水流紊动的影响  

Study on the Effect of Spur Dikes on the Flow Turbulence of Bend Channel

作　　者：陈建[1] 张明[2] 史志鹏[1] 何婷婷[1] 

机构地区：[1]江苏建筑职业技术学院市政工程学院,江苏徐州221116 [2]江苏省水利厅规划办公室,江苏南京210029

出　　处：《安徽农业科学》2012年第6期3791-3793,共3页Journal of Anhui Agricultural Sciences

摘　　要：根据RNG k-ε湍流模型及Reynods方程,利用VOF法追踪自由表面,有限体积法离散求解,建立了相应的概化模型,通过数值模拟的方法研究了不同角度下,丁坝对弯道水流特性的影响。重点分析了丁坝对弯道水流横向水面超高和流速场的影响。结果表明,在丁坝影响下,弯道水流横向水面横比降计算公式需要进行修正,应当考虑到丁坝对河道的束窄、丁坝尺寸和弯道角度等综合因素的影响。该研究为进一步深入探讨弯道水流特性奠定了基础,也为相关的工程实践提供了参考。According to the RNG k-ε model and Reynods equation,a generalized model was established by using the VOF method to track the free water surface and the finite volume method to solve the equation.The numerical simulation method was adopted to study the effects of spur dikes on flow characteristics in bend channel in different angles.The paper focused on analyzing the effects of spur dikes on the lateral superelevation of the water surface and velocity field.Results showed that,under the effects of spur dikes,the formula of the lateral superelevation of water surface needed to be amended,a reasonable formula for the lateral slope of the water surface should take into account spur dikes on the river＇s narrow beam,spur dikes size and bend angles and other comprehensive factors.The study laid foundation for further exploring the flow characteristics in bend channel and provided reference to the related engineering practice.

关 键 词：丁坝 弯道水流 RNGk-ε模型 VOF方法 

分 类 号：TV131[水利工程—水力学及河流动力学]