齐口裂腹鱼对大坝下游流态的响应及近坝区上溯路线预测

以大渡河枕头坝水电站为例,依据齐口裂腹鱼的洄游水力学特性,通过RNGκ-ε紊流模型和VOF自由液面处理的三维紊流数值模拟来研究不同工况下的流态。基于齐口裂腹鱼对不同流态的响应关系,预测了近坝区的上溯洄游路线。结果表明,枕头坝下游齐口裂腹鱼的洄游路线在两种典型工况下各有左右岸2条,两种工况下鱼类均能顺利的洄游到坝前位置,鱼道进口位置均处在两种工况下的洄游路线1上;#1和#2鱼道进口水流紊动过大,建议在#1和#2鱼道进口增设补水设施,塑造较强的吸引流条件,吸引鱼类识别并进入鱼道进口。

Response of Schizothorax Prenanti to the Downstream Flow Pattern of Dam and Prediction of Upstream Movement Route in the Near Dam Area

Taking the Zhentouba Hydropower Station in Daduhe River as an example,the flow state under different working conditions was studied by numerical simulation of three-dimensional turbulent flow using RNGκ-εturbulence model and VOF free level treatment based on the schizothorax prenanti hydrodynamic characteristics of migratory fish.The upstream movement route close to the dam area was predicted on the basis of the response of schizothorax prenanti to the different flow pattern.The result shows that the migratory route of the schizothorax prenanti in the downstream of the Zhentouba dam has two left and right banks under two typical conditions,and all the fish can smoothly swim to the position in front of the dam while the fishway entrance positions are located in the migratory route 1.Since the fishway entrance water flow turbulence is too large,it is recommended to add facilities of water supplement to the#1 and#2 fishway entrance for creating a strong suction flow condition to attract fish identification and enter the fishway entrance.