摘要
为研究地下工程U形阶梯在洪水入侵灾害工况下的流场特性,利用三维计算流体力学(CFD)以及VOF多相流模型,对不同进水水深、进水流速以及进水位置工况下阶梯通道内的流场特性进行了三维流场数值模拟。结果表明:洪水从阶梯通道上方进口流入后,会在阶梯靠近栏杆处形成低速区,人员可经此低速区逃生;合理地设计阶梯通道的进门位置,有利于通道内侧低速区的形成;相较于进口流速,进口水深对阶梯上水深与流速的影响最为明显,进口水深越低,阶梯上水深与流速越低,越利于人员逃生。
In order to investigate the flow characteristics of U-shaped staircases in underground engineering under flood-induced disaster conditions,three-dimensional computational fluid dynamics(CFD) and Volume of Fluid(VOF) multiphase flow model are employed to simulate the flow characteristics within the staircase channel under different inflow water depths,inflow velocities and inflow positions.The findings reveal that,(a) when floodwater enters from above the staircase channel,a low-velocity zone will be formed near the railing,providing a viable escape route for individuals;(b) the reasonable design of entrance position of the staircase channel can facilitate the formation of the low-velocity area on the inner side of channel;and(c) compared with the inflow velocity,the inflow water depth has the most obvious influence on water depth and flow velocity along the staircase,and the lower the inflow water depth,the lower the water depth and flow velocity on the staircase and the more conducive to personnel escape.
作者
张宏亮
贾超
江婷
刘跃飞
ZHANG Hongliang;JIA Chao;JIANG Ting;LIU Yuefei(Yalong River Hydropower Development Co.,Ltd.,Chengdu 610051 Sichuan China;China Renewable Energy Engineering Institute,Beijing 100120 China;College of Mechanical and Electrical Engineering,Jinling Institute of Technology,Nanjing 211169 Jinagsu China)
出处
《水力发电》
CAS
2024年第7期49-53,58,共6页
Water Power
基金
国家重点研发计划(2022YFC3005403)
西藏自治区科技重大专项(XZ202201ZD0003G)。
关键词
地下工程
U形阶梯
洪水入侵
流场特性
CFD-VOF方法
underground engineering
U-shaped staircase
flood invasion
flow field characteristics
CFD-VOF method
