【作者】 丁祖寒； 彭清娥；

【Author】 DING Zu-han;PENG Qing-e;State Key Laboratory of Hydraulics and Mountain River Engineering,College of Water Resources and Hydropower,Sichuan University;

【机构】 四川大学水力学与山区河流开发保护国家重点实验室；

【摘要】 涪江唐家渡电航工程是一个具有防洪、发电、和航运等多目标综合开发利用的水利水电枢纽工程,其通航任务也是重中之重。同一来流情况下,枢纽不同的闸门启闭方式对下游通航水流条件将产生重大的影响。本研究采用Mike21建模软件,选用非结构化三角网络结构模型,建立涪江唐家渡电航工程平面二维水动力学模型,进行了各特征通航流量下不同闸门启闭方式的水流数值模拟,通过对比分析,提出了满足通航条件的闸门启闭最优方案。涪江唐家渡电航工程通航条件下最优闸门启闭方式为:来流量为洪水流量5000m~3/s时,闸门全闸开启泄洪,枢纽上游引航道附近流态较为平稳,水深也满足通航要求,下游引航道附近存在较小回流区,对通航影响不大,水流能满足通航要求;来流量为大于枯水流量484 m~3/s小于枢纽控泄最大流量2000 m~3/s时,5孔冲沙闸关闭,分别局部开启右侧组泄洪闸、左侧组泄洪闸及全部泄洪闸,均满足通航要求,但通过流速分析和方案比选,此种情况下,最优的闸门运行方式为5孔冲砂闸关闭,局部开启右侧组泄洪闸;流量小于枯水期流量484 m~3/s时,泄洪冲砂闸全关,此工况下来流量小,水流流态平稳,满足通航要求。更多还原

【Abstract】 Tangjiangdu Power Project is a water conservancy and hydropower project with multi-purpose comprehensive development and utilization such as flood prevention,power generation,and shipping,and its navigation task is also of the highest priority.In the same flow situation,different gate opening and closing methods of the hub will have a significant impact on the downstream navigation flow conditions.This paper adopts Mike21 modeling software,chooses the unstructured triangular network structure model,establishes the planar two-dimensional hydrodynamic model of the Tangjiadu Power Project in the Fu River,and conducts the numerical simulation of the opening and closing modes of different gates under various characteristics of navigable flow.Through comparative analysis,the optimal solution for opening gates that satisfies the navigable conditions is proposed.The optimal opening form of the gate under the navigable conditions of the Tangjiangdu Power Project is When the flow rate is 5000 m~3/s,the gate will open fully to flood discharge.The flow status near the upstream adjacent navigation channel of the hub is relatively stable,the water depth also meets the navigation requirements.There is a small recirculation zone near the downstream approach channel,which has little impact on navigation and the water flow can also meet the navigation requirements.When the traffic flow is greater than the dry flow rate of 484 m~3/s and is less than the maximum flow rate of 2000 m~3/s,the five-hole flush-sluice gate is closed,and partially open the flood discharge gates on the right side,the flood discharge gates on the left side,all the flood discharge gates,all of the results meet the navigation requirements.However,through flow velocity analysis and alternative comparison,in this case,the optimal gate operation mode is to close the 5 hole flushing sand gate and partially open the flood gate in the right group.When the flow rate is less than 484 m~3/s,the flood discharge gate and sand flushing gate are all closed,under this operating condition,the flow rate is small,the water flow is stable,and it meets the navigation requirements.更多还原