Application of coupled multi-component flow simulation in development of hydraulic turbines

摘要

For a hydraulic turbine, the single stationary and rotating component separate flow simulation can not accurately represent the actual flow behavior in these components because of both the ignorance of component-to-component interaction and the difficulty in accurately specifying the boundary conditions. On the other hand, the complete turbine flow simulation from the inlet of spiral case to the outlet of draft tube will need very powerful computer configuration with a large memory and a high computation speed, therefore leading to a high simulation cost. This paper presents some experiences of coupled multi-component three-dimensional navier-Stokes flow simulation in the development of hydraulic turbines. Some flow simulation results of different coupled components for a Francis turbine in different operating conditions are given and discussed.