Three-dimensional analysis of flow in the spiral casing of a reaction turbine using a differently weighted Petrov Galerkin

摘要

A weighted residual based finite element method has been used to predict the flow structure and the head loss in the spiral casing of a reaction turbine. An explicit Eulerian velocity correction scheme has been employed to solve the complete Reynolds-averaged Navier- Stokes equations. A Differently Weighted Petrov Galerkin (DWPG) method has been used for spatial discretization. The simulation has been Performed for high Reynolds numbers. The head loss in the spiral casing has been calculated for Re = 5 × 10~5 and Re =10~6.