摘要
针对丁坝对弯道水流水力特性影响的问题,建立了相应的概化模型,通过数值模拟的方法,利用RNG k-湍流模型封闭Reynods方程,VOF法追踪自由表面,通过有限体积法离散求解,模拟研究了不同弯道中心角情况下,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,弯道水流水面横比降计算公式需要进行修正,应当考虑丁坝对河道的束窄、丁坝尺寸和弯道角度等综合因素的影响。
According to the problem of the effects of spur dikes to the flow characteristics in bend channel, the generalized model is established. Through the numerical simulation method, the RNG kmodel was used to close Reynods equations, VOF method was used to track the free water surface, with the finite volume method to solve the equation, the paper simulated the effects of spur dikes to the flow characteristics in bend channel in different angled, analyzed the effects of spur dikes to the lateral superelevation of the water surface and velocity field. The results show that on the effects of spur dikes, the formula of the lateral superelevation of the water surface need to be amended, a reasonable formula for the lateral slope of the water surface should take into account influence of spur dikes to the comprehensive factors of narrowed river, size of spur dikes and bend angles.
出处
《人民黄河》
CAS
北大核心
2011年第12期109-111,114,共4页
Yellow River
关键词
丁坝
弯道水流
RNGk-模型
VOF法
spur dikes
bend channel flow
RNG k- turbulenee model
VOF method
