水电站进水口渐变段局部水头损失研究

为研究水电站进水口渐变段局部水头损失,分别针对渐变段长度、隧洞长度和圆形隧洞直径三个影响因素,采用CFD方法模拟了15种进水口渐变段,进行数值分析。在此基础上,通过量纲分析研究了水电站进水口渐变段水头损失的敏感性。结果表明:水电站进水口渐变段局部水头损失与渐变段长度、隧洞长度和圆形隧洞直径有关;渐变段长度、隧洞长度对局部水头损失影响较小,而隧洞直径对局部水头损失影响较大。研究结果可为水电站进水口渐变段设计计算提供参考。

Study on local head loss of intake transition section of hydropower station

In order to study the local head of the intake transition section loss of hydropower station， the numerical simulations are made on 15 kinds of intake transition sections with CFD for the three impacting factors such as the length of the transition section， the tunnel length and the diameter of circular tunnel. On the basis of this， the sensitivity of the head loss of the intake transition section of hydropower station is analyzed through the relevant dimensional analysis. The result shows that the local head of the intake transition section loss of hydropower station is related to the length of the transition section， the tunnel length and the diameter of circular tunnel， while the impacts from the length of transition section and the length of tunnel on the local head loss are smaller and the impact from the diameter of tunnel on the local loss is larger. The study result can provide references for the design calculation of intake transition section.