数值模拟对比研究微挑消力池水力特性  

Comparative numerical simulation of hydraulic characteristics of deflecting stilling basin

作　　者：程飞[1] 白瑞迪[1] 刘善均[1] 刘小兵[2] 陈瑞华[3] 

机构地区：[1]四川大学水力学及山区河流开发保护国家重点实验室,成都610065 [2]西华大学,成都610039 [3]中国水电顾问集团昆明勘测设计研究院,昆明650051

出　　处：《水力发电学报》2012年第2期71-78,共8页Journal of Hydroelectric Engineering

基　　金：国家科技支撑计划资助项目(2008BAB29B04)

摘　　要：为研究"微挑消力池"水力特性,本文采用三维RNG k-ε紊流模型对其及反弧消力池、跌坎消力池、陡坡消力池进行了数值模拟,对比分析了微挑消力池的水面线、流场结构、临底流速、出池流速及时均压力、动水压力分布等的特点;研究结果表明,微挑消力池入池段"微挑"的体型特征,使有限的结构空间得到较充分的水体紊动,底流入池方向有利,临底流速衰减较快。Numerical simulation of 3D turbulent flow with a RNG k-ε model was conducted to study stilling basins with different inlet design schemes of deflecting arc,conventional arc,step_down and steep slope,including a detailed comparison of free surface elevation,velocity field,velocity on the slab,outflow velocity,pressure distribution and dynamic pressure distribution.The results show that the deflecting arc scheme is better than the other three schemes and that the deflecting stilling basin（DSB） has more turbulent flow in the limited basin space,more favorable inflow pattern and greater rate of velocity decay along the bottom slab.

关 键 词：水力学 微挑消力池 数值模拟 水力特性 RNG K-Ε紊流模型 消能 

分 类 号：TV135.23[水利工程—水力学及河流动力学]