闭门速度对事故闸门门体水力荷载影响研究

抽水蓄能电站引水洞水流边界条件复杂,研究在事故工况下事故闸门动水闭门可靠性以及闭门速度对事故闸门闭门持住力的影响十分必要。以响水涧抽水蓄能电站下库进水口事故闸门为研究对象,按重力相似准则建立比尺为1∶22的水力相似模型,通过模型试验,对响水涧抽水蓄能电站下库进水口事故闸门在不同闭门速度工况动水闭门过程中门体水力荷载及通气孔风速进行了研究。测量分析结果表明:闭门速度在1.126~2.835 m/min范围内时,事故闸门均能依靠门顶形成的水柱动水关闭,闭门速度对事故闸门动水闭门过程中的门体水力荷载及通气孔的风速影响较小。研究成果对抽水蓄能电站进水口事故闸门的设计和运行具有重要参考价值。

Study on impact from gate closing speed on hydraulic load on body of emergency gate

As the boundary condition of the flow in the diversion tunnel of pumped storage hydropower station is complicated， it is quite necessary to study both the reliability of hydrodynamic gate closing of emergency gate under accident condition and the impact from gate closing speed on the holding force of emergency gate. By taking the intake emergency gate for the lower reservoir of Xiangshuijian Pumped Storage Hydropower Station as the study object， a hydraulic similarity model with the scale of 1∶20 is established in accordance with the gravity similarity criterion， and then the hydraulic load on the body of the intake emergency gate for the lower reservoir of Xiangshuijian Pumped Storage Hydropower Station during the hydrodynamic gate closing process under the conditions of various gate closing speeds and the ventilating speed of aerator are studied through the model experiment. The results from measurement and analysis show that when the gate closing speed is within the range of 1.126～2.835 m/min， the hydrodynamic gate closing of the emergency gate can be realized with the water column formed upon the gate， while the impact from the gate closing speed on both the hydraulic load on gate body and the ventilating speed of aerator during the hydrodynamic gate closing process is less. The relevant experimental data has an important reference value for design and operation of the intake emergency gate of pumped storage hydropower station.