从江航电枢纽泄水闸开启方式优化研究

Study on optimized opening mode for sluice gates of Congjiang Navigation Hydrojunction

利用从江航电枢纽整体物理模型,研究986 m3/s、1 536 m3/s和3 200 m3/s等三级控泄流量时,闸门开启高度、闸门开启顺序对枢纽下游水流条件的影响。重点分析观测的各方案枢纽坝下流速流态和下游船闸口门区及连接段的表面流速,得出该流量级泄水闸开启的优化方式。流量较小时,泄流闸开启孔位对下游河道水流条件有较为明显的影响;当流量较大时,泄水闸开启孔数增多,相应孔位的不同对下游河道水流条件影响作用减弱。在控泄流量时,泄水闸开启以分散开启或全开方式较好;既便小流量时,因电站出流的影响,泄流闸也宜采用分散开启方式。

Based on the physical model of Congjiang Navigation Hydro-junction,the flow conditions in down-stream region under different orders and heights of opening sluice gates in 986 m^3/s,1 536 m^3,3 200 m^3/s werestudied in this paper. According to junction′s downstream flow conditions and the navigation conditions analysis ofconnecting section and downstream approach entrance region,the optimized opening modes for release sluice wereproposed. The results show that the position of opening sluice gates has obvious effect on the downstream flow condi-tion in small flow,and the effect decreases while all the sluice gates are open in high flow. The results also showthat the effective way is to dispersing open or fully open the sluice gates in small flow rate because of the flow influ-ence from the power station.