Study on Improvement of Pump Turbine S-Characteristics Based on Jet Refill
Aiming at the"S"characteristic of pump turbine,the solution of installing water injection pipe in the leaf-less area at the top of guide vane was proposed.The"S"characteristic curves were simulated at different positions of the water injection pipe,and the changing laws of streamline in runner region,flow distribution in each runner channel were analyzed after installing water injection pipe.The results show that the installation of water injection pipe on the top of the guide vane can effectively improve the flow characteristics of the runner and reduce the interaction between the runner and the guide vane,and the different locations of the water injection pipe have a certain effect on the improvement effect.When the location of the water injection pipe is in the middle of the leafless region and near the inlet end of the runner,the improvement of"S"characteristics is relatively obvious.
NETL
NSTL
万方数据
维普
