摘要
针对大单宽流量、低弗劳德数的中低水头消力池中存在摆动水跃,进而导致消力池内流态不稳定、跃后水面波动大、消能率低等问题,结合物理模型试验和三维RNGκ-ε紊流数值模拟,分析了趾墩和悬栅两种辅助消能工的消力池的水力特性和消能效果。结果表明,消力池内联合布置趾墩和悬栅后,消力池内流态稳定,摆动水跃消失,底板最大时均动水压强降低26.7%;水流结构明显改变,栅条周围猝发的小尺度涡加剧了水体之间的碰撞和剪切,消能率由69.06%升至74.18%,消能效果显著。
Aiming at the problems of unstable flow regime,violent fluctuation of water surface after the hydraulic jump and low energy dissipation rate caused by oscillating hydraulic jump in medium and low head stilling basin with large basin,the chute block and the suspended grid,are studied by combining physical model test and three-dimensional RNGκ-εturbulence numerical simulation.The results show that after the chute block and the suspended grid are arranged in the dynamic water pressure of the bottom plate is reduced by 26.7%;The water flow structure has changed significantly,and ergy dissipation is significant,whose rate increased from 69.06%to 74.18%.
作者
高尚
牧振伟
俞晓伟
GAO Shang;MU Zhen-wei;YU Xiao-wei(College of Hydraulic and Civil Engineering,Xinjiang Agricultural University,Urumqi 830052,China;Xinjiang Key Laboratory of Hydraulic Engineering Security and Water Disasters Prevention,Urumqi 830052,China)
出处
《水电能源科学》
北大核心
2021年第6期108-111,122,共5页
Water Resources and Power
基金
国家自然科学基金项目(51469031)
新疆维吾尔自治区高校科研计划创新团队项目(XJEDU2017T004)。
关键词
底流消能
悬栅
趾墩
水力特性
underflow energy dissipation
suspended grid
chute block
hydraulic characteristic
