摘要
详细介绍了无压引水隧洞水力过渡过程计算的数学模型，给出了具体水电站工程的数值计算实例，并与水力模型试验成果进行了对比。电站丢弃负荷后，无压引水隧洞中的涌波过程与隧洞内的水工建筑物布置有密切联系，在无压引水隧洞中布置溢流堰是限制隧洞中涌波水位的有效工程措施，下游流量变化速率越大，无压隧洞中的涌波波峰越陡。数学模型计算与水力模型试验相结合是研究水电站无压引水隧洞水力过渡过程的有效途径，研究成果可以作为工程设计依据。
A mathematical model of hydraulic transient in free flow tunnel is introduced in detail, an example of a practical hydropower station by numerical computation is given, whose results are compared with ones of the experiment on hydraulic model. After a load rejection in the power station, the process of surge in free flow tunnel is related to the layout of tunnel structure. In order to restrain the surge, the effective measure is setting an overflow weir. The greater the change rate of discharge downstream occurred, the steeper the peak of the surge in free flow tunnel is. Combination of mathematical model computation and experiment is an effective method to study hydraulic transient in free flow tunnel. The result of the research can be offered to engineering designers.
出处
《西北水力发电》
2004年第4期1-4,8,共5页
Journal of Northwest Hydroelectric Power
关键词
无压引水隧洞
水力过渡过程
数值计算
free-flow tunnel
hydraulic transient
numerical computation
