溢洪道弯道水流影响因素研究  

Study on factors influencing the flow over bend spillway

作　　者：高学平[1] 井书光[1] 贾来飞[1] 

机构地区：[1]天津大学水利工程仿真与安全国家重点实验室,天津300072

出　　处：《水力发电学报》2014年第4期132-138,共7页Journal of Hydroelectric Engineering

基　　金：国家自然科学基金创新研究群体科学基金资助项目(51321065);国家自然科学基金(51279125)

摘　　要：弯道水流受惯性离心力作用产生水面倾斜和扭曲,导致水面超高、凹岸冲刷和凸岸淤积等问题。本文采用RNG k-ε-紊流模型封闭雷诺方程和VOF法追踪自由表面,对某水库溢洪道弯道水流进行三维数值模拟,研究弯道水流水面调整的影响因素。首先,利用物理模型试验结果对溢洪道弯道水流的数值模拟方法进行了验证;其次,基于已验证的数学模型,通过调整弯道段的首端坎横向坡比、底板横向坡比、底板纵向坡降,研究了弯道水面变化规律;最后,对弯道水流水面调整影响因素进行了总结。研究成果对于调整弯道水流具有指导意义。Flow over a bend spillway produces surface tilt and distortion by inertial centrifugal force, causing ultra-high water surface, concave bank erosion, and convex bank deposition, etc. To examine its influencing factors, this study has conducted three-dimensional simulations of the flow, based on a RNG k-ε turbulence model and VOF method for free surface tracking. First, the simulation method is verified by physical model tests. Second, the validated model is applied to the simulations through adjusting various parameters, such as horizontal slope of front sill, bottom horizontal slope of the bend, and longitudinal gradient of the bend. Last, the factors influencing water surface adjustment over the bend are summarized. The results would be useful for design of similar spillways.

关 键 词：水力学 弯道水流 RNG K-Ε紊流模型 VOF法 水面调整 

分 类 号：TV135[水利工程—水力学及河流动力学]