摘要
鉴于研究水库溃坝时溃坝波传播过程及流量变化规律对大坝安全管理具有十分重要的意义,特做了30组工况下的平底无阻力矩形水槽瞬时溃坝模型试验。结果表明,瞬时溃坝后下游无水时的溃坝波呈反"S"型向下游演进,下游有水时会有相对稳定的激波区产生;渐进流区水力特性仅受初始上游水深影响,而激波区水力特性除受上游水深影响外,还受初始下游水深比的影响,随着下游水深的增大,所涌起的激波区范围越广水深越大,但溃坝流量越小。研究结果为大坝或水闸设计及其安全管理提供了参考依据。
In view of the great significance in research of the dam-break wave evolution process and variation regularity of the discharge for the dam safety management,this paper carried out model test of the instantaneous dam-break of the flat-bottomed rectangular flume with no resistance under 30 working conditions.The results show that the dam-break wave evolves to the dry downstream bed in the form of reverse S-shaped curve,and there will be relatively stable shock zone when it evolves to the wet downstream bed.The hydrodynamic features of the progressive flow zone are only affected by the depth ratio,while the hydrodynamic features of the shock zone are also affected by the initial downstream depth ratio;with the increase of the downstream depth,the scope of the shock zone is wider and the water depth is greater,but the dam-break discharge is smaller.The results provide reference for the design and safety management of dams and sluices.
作者
宋家俊
王波
刘文军
马晓
陈云良
伍超
SONG Jia-jun;WANG Bo;LIU Wen-jun;MA Xiao;CHEN Yun-liang;WU Chao(State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065,China)
出处
《水电能源科学》
北大核心
2018年第4期77-81,共5页
Water Resources and Power
基金
国家自然科学基金项目(51209155)
关键词
水槽模型试验
瞬时溃坝
水深比
水力特性
flume model test
instantaneous dam-break
depth ratio
hydrodynamic features
