Numerical Simulation of Two-Dimensional Corner Flows in a Circulating Water Channel with Guide Vanes

抄録

A Navier-Stokes procedure is developed based on the Finite Volume Method to simulate the 2-D corner flows in a CWC. The staggered grid is adopted and a new method is presented to coupling the velocities and the pressure when the grid lines change direction by 90°. The turbulince is approximated using k-ε model and a transfinite algebraic method is used to generate the body fitted coordinates. After validation of the computer code, the corner flows in a CWC was calculated and the effect of guide vanes was investigated. For laminar flows, the guide vanes may restrain the separations on the inner side but not so effective on the outside; for turbulent flows, separations on the inner side disappeared even without guide vanes but still remained on the outside. By incorporating guide vanes, the separation can be effectively controlled.