Numerical Simulation of Cavitating Flow in a Francis Turbine

被引：0
|
作者：
Zhou, Lingjiu [1 ]
Wang, Zhengwei [1 ]
Luo, Yongyao [1 ]
Peng, Guangjie [1 ]
机构：
[1] China Agr Univ, Coll Water Conservancy & Civil Engn, Beijing, Peoples R China
来源：
PROCEEDINGS OF THE ASME FLUIDS ENGINEERING DIVISION SUMMER CONFERENCE -2008, VOL 1, PT A AND B | 2009年
关键词：
cavitating flow; Francis turbine; numerical simulation;
D O I：
暂无
中图分类号：
V [航空、航天];
学科分类号：
08 ; 0825 ;
摘要：
The 3-D unsteady Reynolds averaged Navier-tokes equations based on the pseudo-homogeneous flow theory and a vapor fraction transport-equation that accounts for non-condensable gas are solved to simulate cavitating flow in a Francis turbine. The calculation results agreed with experiment data reasonably. With the decrease of the Thoma number, the cavity first appears near the centre of the hub. At this stage the flow rate and the efficiency change little. Then the cavity near the centre of the hub grows thick and the cavities also appear on the blade suction side near outlet. With further reduce of the Thoma number the cavitation extends to the whole flow path, which causes flow rate and efficiency decrease rapidly.
引用
收藏
页码：1193 / 1197
页数：5
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