Numerical simulation of air-water two-phase flow over stepped spillways  

作　　者：CHENG Xiangju1, CHEN Yongcan1 & LUO Lin2 1. Department of Hydraulic Engineering, Tsinghua University, Beijing 100084, China 2. State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China 

出　　处：《Science China(Technological Sciences)》2006年第6期674-684,共11页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.50609011).

摘　　要：Stepped spillways for significant energy dissipation along the chute have gained interest; popularity among researchers; dam engineers. Due to the complexity of air-water two-phase flow over stepped spillways, the finite volume computational fluid dynamics module of the FLUENT software was used to simulate the main characteristics of the flow. Adopting the RNG k- turbulence model, the mixture flow model for air-water two-phase flow was used to simulate the flow field over stepped spillway with the PISO arithmetic technique. The numerical result successfully reproduced the complex flow over a stepped spillway of an experiment case, including the interaction between entrained air bubbles; cavity recirculation in the skimming flow regime, velocity distribution; the pressure profiles on the step surface as well. The result is helpful for understanding the detailed information about energy dissipation over stepped spillways.

关 键 词：stepped spillway  MIXTURE model  RNG k-εmodel  AIR-WATER TWO-PHASE flow. 

分 类 号：TV651.1[水利工程—水利水电工程]