摘要
通过1∶80的三峡枢纽及下游引航道整体物理模型研究了典型的大坝泄洪、电站调峰、船闸泄水及其叠加工况下的升船机下游引航道非恒定流波动特性。结果表明:三峡枢纽下游引航道内的水位波动是引航道波流运动和两坝间流量差引起的河道涨、落水长波耦合叠加的结果。枢纽进行百年一遇洪水调节时升船机下闸首水位波动最大小时变幅0.61 mh。当大坝泄洪单次调节流量小于2 000 m^3s时,升船机下闸首水位波动小时变幅小于0.42 mh。电站调峰运行时,升船机引航道水位波动首波幅值随流量变幅和变率的增大而增大,最大小时变幅则取决于流量变幅和两坝间净流量大小。船闸双线同时泄水时升船机下闸首水位最大小时变幅0.18 mh,基本不影响升船机运行。
An integrated physical model of the Three Gorges Project and the downstream approach channel at a scale of 1：80 was used to simulate water level fluctuation in the approach channel of the ship lift under experimental conditions, i. e.flood discharge, peaking, and ship lock emptying, and superimposed conditions of the three.The results indicated that the water level fluctuated in downstream approach channel of the Three Gorges Project because of the combination of long wave caused by the flow difference between the two dams and the channel and the fluctuation in the approach channel. Under condition of a 100-year recurrence flood discharge, the hourly variation of water level for downstream lock head of the ship lift was 0. 61 m/h.The hourly variation of water level for downstream lock head of the ship lift was less than 0. 42 m/h with one time flood discharge adjustment of more than 2 000 m^3/s.Under conditions of peaking, the first wave amplitude of fluctuation in downstream approach channel of the ship lift increased with the increase of flow amplitude and variable rate, while the variable rate depended on the flow amplitude and the net flow between the two dams. When the two lines of ship lock empty at the same time, the water level fluctuation for downstream lock head of the ship lift had no significant impact on running of the ship lift with a maximum hourly variation of 0. 18 m/h.
出处
《水运工程》
北大核心
2016年第12期158-163,共6页
Port & Waterway Engineering
基金
国家重点研发计划(2016YFC0402002
2016YFC0402004
2016YFC0402007
2016YFC0401906)
关键词
引航道
非恒定流
波动
模型试验
approach channel
unsteady flow
fluctuation characteristics
experimental research
作者简介
程龙（1989-），男，博士研究生，从事通航水力学方面的研究。
